diff --git a/Controllers/FamilyController.cs b/Controllers/FamilyController.cs
index 23999c7..ebf9f44 100644
--- a/Controllers/FamilyController.cs
+++ b/Controllers/FamilyController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<Family>> Get()
 
         // POST api/Family/create
         [HttpPost("create")]
-        public async Task Create([FromBody] string name)
+        public async Task<Guid> Create([FromBody] string name)
         {
-            await familyService.CreateFamilyAsync(name);
+            return await familyService.CreateFamilyAsync(name);
         }
 
         // PUT api/Family/5
diff --git a/Controllers/FamilyMechListController.cs b/Controllers/FamilyMechListController.cs
index c74430e..e90e9d8 100644
--- a/Controllers/FamilyMechListController.cs
+++ b/Controllers/FamilyMechListController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<FamilyMechList>> Get()
 
         // POST api/FamilyMechList/create
         [HttpPost("create")]
-        public async Task Create([FromBody] FamilyMechList newFamilyMechList)
+        public async Task<Guid> Create([FromBody] FamilyMechList newFamilyMechList)
         {
-            await familyMechListService.CreateFamilyMechListAsync(newFamilyMechList);
+            return await familyMechListService.CreateFamilyMechListAsync(newFamilyMechList);
         }
 
         // PUT api/FamilyMechList/5
diff --git a/Controllers/FamilyMechListVersionController.cs b/Controllers/FamilyMechListVersionController.cs
index 5e3599b..0b67d2e 100644
--- a/Controllers/FamilyMechListVersionController.cs
+++ b/Controllers/FamilyMechListVersionController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<FamilyMechListVersion>> Get()
 
         // POST api/FamilyMechListVersion/create
         [HttpPost("create")]
-        public async Task Create([FromBody] FamilyMechListVersion newFamilyMechListVersion)
+        public async Task<Guid> Create([FromBody] FamilyMechListVersion newFamilyMechListVersion)
         {
-            await familyMechListVersionService.CreateFamilyMechListVersionAsync(newFamilyMechListVersion);
+            return await familyMechListVersionService.CreateFamilyMechListVersionAsync(newFamilyMechListVersion);
         }
 
         // PUT api/FamilyMechListVersion/5
diff --git a/Controllers/MechTagMechListController.cs b/Controllers/MechTagMechListController.cs
index c3e006a..271966a 100644
--- a/Controllers/MechTagMechListController.cs
+++ b/Controllers/MechTagMechListController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<MechTagMechList>> Get()
 
         // POST api/MechTagMech/create
         [HttpPost("create")]
-        public async Task Create([FromBody] MechTagMechList newMechTagMech)
+        public async Task<Guid> Create([FromBody] MechTagMechList newMechTagMech)
         {
-            await mechTagMechService.CreateMechTagMechAsync(newMechTagMech);
+            return await mechTagMechService.CreateMechTagMechAsync(newMechTagMech);
         }
 
         // PUT api/MechTagMech/5
diff --git a/Controllers/MechTagMechListVersionController.cs b/Controllers/MechTagMechListVersionController.cs
index 1b2b0ae..8b2c5c0 100644
--- a/Controllers/MechTagMechListVersionController.cs
+++ b/Controllers/MechTagMechListVersionController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<MechTagMechListVersion>> Get()
 
         // POST api/MechTagMechListVersion/create
         [HttpPost("create")]
-        public async Task Create([FromBody] MechTagMechListVersion newMechTagMechListVersion)
+        public async Task<Guid> Create([FromBody] MechTagMechListVersion newMechTagMechListVersion)
         {
-            await mechTagMechListVersionService.CreateMechTagMechListVersionAsync(newMechTagMechListVersion);
+            return await mechTagMechListVersionService.CreateMechTagMechListVersionAsync(newMechTagMechListVersion);
         }
 
         // PUT api/MechTagMechListVersion/5
diff --git a/Controllers/MechanismController.cs b/Controllers/MechanismController.cs
index a0e4684..f5a8ea2 100644
--- a/Controllers/MechanismController.cs
+++ b/Controllers/MechanismController.cs
@@ -43,9 +43,9 @@ public async Task<IReadOnlyList<Mechanism>> Get()
 
         // POST api/Mechanism/create
         [HttpPost("create")]
-        public async Task Create([FromBody] string name)
+        public async Task<Guid> Create([FromBody] string name)
         {
-            await mechanismService.CreateMechanismAsync(name);
+            return await mechanismService.CreateMechanismAsync(name);
         }
 
         // PUT api/Mechanism/5
diff --git a/Controllers/PropertyListController.cs b/Controllers/PropertyListController.cs
index 995826d..3f3093e 100644
--- a/Controllers/PropertyListController.cs
+++ b/Controllers/PropertyListController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<PropertyList>> Get()
 
         // POST api/PropertyList/create
         [HttpPost("create")]
-        public async Task Create([FromBody] PropertyList userPreferneces)
+        public async Task<Guid> Create([FromBody] PropertyList userPreferneces)
         {
-            await userpreferencesService.CreatePropertyListAsync(userPreferneces);
+            return await userpreferencesService.CreatePropertyListAsync(userPreferneces);
         }
 
         // PUT api/PropertyList/5
diff --git a/Controllers/PropertyTypeController.cs b/Controllers/PropertyTypeController.cs
index e4ef3a3..6dcbb1a 100644
--- a/Controllers/PropertyTypeController.cs
+++ b/Controllers/PropertyTypeController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<PropertyType>> Get()
 
         // POST api/PropertyType/create
         [HttpPost("create")]
-        public async Task Create([FromBody] PropertyType propertyType)
+        public async Task<Guid> Create([FromBody] PropertyType propertyType)
         {
-            await propertyTypeService.CreatePropertyTypeAsync(propertyType);
+            return await propertyTypeService.CreatePropertyTypeAsync(propertyType);
         }
 
         // PUT api/PropertyType/5
diff --git a/Controllers/PropertyVersionController.cs b/Controllers/PropertyVersionController.cs
index 3aeeb99..b5ac5a6 100644
--- a/Controllers/PropertyVersionController.cs
+++ b/Controllers/PropertyVersionController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<PropertyVersion>> Get()
 
         // POST api/PropertyVersion/create
         [HttpPost("create")]
-        public async Task Create([FromBody] PropertyVersion newPropertyVersion)
+        public async Task<Guid> Create([FromBody] PropertyVersion newPropertyVersion)
         {
-            await propertyVersionService.CreatePropertyVersionAsync(newPropertyVersion);
+            return await propertyVersionService.CreatePropertyVersionAsync(newPropertyVersion);
         }
 
         // PUT api/PropertyVersion/5
diff --git a/Controllers/ReactionController.cs b/Controllers/ReactionController.cs
index 99e21b0..e2e8344 100644
--- a/Controllers/ReactionController.cs
+++ b/Controllers/ReactionController.cs
@@ -42,9 +42,9 @@ public async Task<IReadOnlyList<Reaction>> Get()
 
         // POST api/Reaction/create
         [HttpPost("create")]
-        public async Task Create([FromBody] string type)
+        public async Task<Guid> Create([FromBody] string type)
         {
-            await reactionService.CreateReactionAsync(type);
+            return await reactionService.CreateReactionAsync(type);
         }
 
         // PUT api/Reaction/5
diff --git a/Controllers/ReactionSpeciesListController.cs b/Controllers/ReactionSpeciesListController.cs
index c50e253..67be6e5 100644
--- a/Controllers/ReactionSpeciesListController.cs
+++ b/Controllers/ReactionSpeciesListController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<ReactionSpeciesList>> Get()
 
         // POST api/ReactionSpeciesList/create
         [HttpPost("create")]
-        public async Task Create([FromBody] ReactionSpeciesList newReactionSpeciesList)
+        public async Task<Guid> Create([FromBody] ReactionSpeciesList newReactionSpeciesList)
         {
-            await reactionSpeciesListService.CreateReactionSpeciesListAsync(newReactionSpeciesList);
+            return await reactionSpeciesListService.CreateReactionSpeciesListAsync(newReactionSpeciesList);
         }
 
         // PUT api/ReactionSpeciesList/5
diff --git a/Controllers/ReactionSpeciesListVersionController.cs b/Controllers/ReactionSpeciesListVersionController.cs
index 9347d72..c6a2f72 100644
--- a/Controllers/ReactionSpeciesListVersionController.cs
+++ b/Controllers/ReactionSpeciesListVersionController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<ReactionSpeciesListVersion>> Get()
 
         // POST api/ReactionSpeciesListVersion/create
         [HttpPost("create")]
-        public async Task Create([FromBody] ReactionSpeciesListVersion newReactionSpeciesListVersion)
+        public async Task<Guid> Create([FromBody] ReactionSpeciesListVersion newReactionSpeciesListVersion)
         {
-            await reactionSpeciesListVersionService.CreateReactionSpeciesListVersionAsync(newReactionSpeciesListVersion);
+            return await reactionSpeciesListVersionService.CreateReactionSpeciesListVersionAsync(newReactionSpeciesListVersion);
         }
 
         // PUT api/ReactionSpeciesListVersion/5
diff --git a/Controllers/SpeciesController.cs b/Controllers/SpeciesController.cs
index e70f3a4..72ab680 100644
--- a/Controllers/SpeciesController.cs
+++ b/Controllers/SpeciesController.cs
@@ -42,9 +42,9 @@ public async Task<IReadOnlyList<Species>> Get()
 
         // POST api/Species/create
         [HttpPost("create")]
-        public async Task Create([FromBody] string type)
+        public async Task<Guid> Create([FromBody] string type)
         {
-            await speciesService.CreateSpeciesAsync(type);
+            return await speciesService.CreateSpeciesAsync(type);
         }
 
         // PUT api/Species/5
diff --git a/Controllers/TagMechanismController.cs b/Controllers/TagMechanismController.cs
index db0a3bd..333782b 100644
--- a/Controllers/TagMechanismController.cs
+++ b/Controllers/TagMechanismController.cs
@@ -41,9 +41,9 @@ public async Task<IReadOnlyList<TagMechanism>> Get()
 
         // POST api/TagMechanism/create
         [HttpPost("create")]
-        public async Task Create([FromBody] string tag)
+        public async Task<Guid> Create([FromBody] string tag)
         {
-            await tagMechanismService.CreateTagMechanismAsync(tag);
+            return await tagMechanismService.CreateTagMechanismAsync(tag);
         }
 
         // PUT api/TagMechanism/5
diff --git a/Controllers/TagMechanismReactionListController.cs b/Controllers/TagMechanismReactionListController.cs
index 9137770..4884655 100644
--- a/Controllers/TagMechanismReactionListController.cs
+++ b/Controllers/TagMechanismReactionListController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<TagMechanismReactionList>> Get()
 
         // POST api/TagMechanismReaction/create
         [HttpPost("create")]
-        public async Task Create([FromBody] TagMechanismReactionList newTagMechanismReaction)
+        public async Task<Guid> Create([FromBody] TagMechanismReactionList newTagMechanismReaction)
         {
-            await tagMechReationListService.CreateTagMechanismReactionAsync(newTagMechanismReaction);
+            return await tagMechReationListService.CreateTagMechanismReactionAsync(newTagMechanismReaction);
         }
 
         // PUT api/TagMechanismReaction/5
diff --git a/Controllers/TagMechanismReactionListVersionController.cs b/Controllers/TagMechanismReactionListVersionController.cs
index 30d3128..b87d16c 100644
--- a/Controllers/TagMechanismReactionListVersionController.cs
+++ b/Controllers/TagMechanismReactionListVersionController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<TagMechanismReactionListVersion>> Get()
 
         // POST api/TagMechanismReactionListVersion/create
         [HttpPost("create")]
-        public async Task Create([FromBody] TagMechanismReactionListVersion newTagMechanismReactionListVersion)
+        public async Task<Guid> Create([FromBody] TagMechanismReactionListVersion newTagMechanismReactionListVersion)
         {
-            await tagMechanismReactionListVersionService.CreateTagMechanismReactionListVersionAsync(newTagMechanismReactionListVersion);
+            return await tagMechanismReactionListVersionService.CreateTagMechanismReactionListVersionAsync(newTagMechanismReactionListVersion);
         }
 
         // PUT api/TagMechanismReactionListVersion/5
diff --git a/Controllers/TagMechanismSpeciesListController.cs b/Controllers/TagMechanismSpeciesListController.cs
index ef0a356..eceb52f 100644
--- a/Controllers/TagMechanismSpeciesListController.cs
+++ b/Controllers/TagMechanismSpeciesListController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<TagMechanismSpeciesList>> Get()
 
         // POST api/TagMechanismSpecies/create
         [HttpPost("create")]
-        public async Task Create([FromBody] TagMechanismSpeciesList newTagMechanismSpecies)
+        public async Task<Guid> Create([FromBody] TagMechanismSpeciesList newTagMechanismSpecies)
         {
-            await tagMechSpeciesList.CreateTagMechanismSpeciesAsync(newTagMechanismSpecies);
+            return await tagMechSpeciesList.CreateTagMechanismSpeciesAsync(newTagMechanismSpecies);
         }
 
         // PUT api/TagMechanismSpecies/5
diff --git a/Controllers/TagMechanismSpeciesListVersionController.cs b/Controllers/TagMechanismSpeciesListVersionController.cs
index d091d39..6fa872a 100644
--- a/Controllers/TagMechanismSpeciesListVersionController.cs
+++ b/Controllers/TagMechanismSpeciesListVersionController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<TagMechanismSpeciesListVersion>> Get()
 
         // POST api/TagMechanismSpeciesListVersion/create
         [HttpPost("create")]
-        public async Task Create([FromBody] TagMechanismSpeciesListVersion newTagMechanismSpeciesListVersion)
+        public async Task<Guid> Create([FromBody] TagMechanismSpeciesListVersion newTagMechanismSpeciesListVersion)
         {
-            await tagMechanismSpeciesListVersionService.CreateTagMechanismSpeciesListVersionAsync(newTagMechanismSpeciesListVersion);
+            return await tagMechanismSpeciesListVersionService.CreateTagMechanismSpeciesListVersionAsync(newTagMechanismSpeciesListVersion);
         }
 
         // PUT api/TagMechanismSpeciesListVersion/5
diff --git a/Controllers/UserController.cs b/Controllers/UserController.cs
index 5a60344..cdce97c 100644
--- a/Controllers/UserController.cs
+++ b/Controllers/UserController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<User>> Get()
 
         // POST api/User/create
         [HttpPost("create")]
-        public async Task Create([FromBody] string log_in_info)
+        public async Task<Guid> Create([FromBody] string log_in_info)
         {
-            await userService.CreateUserAsync(log_in_info);
+            return await userService.CreateUserAsync(log_in_info);
         }
 
         // PUT api/User/5
diff --git a/Controllers/UserPreferencesController.cs b/Controllers/UserPreferencesController.cs
index abaadcd..9faf9fd 100644
--- a/Controllers/UserPreferencesController.cs
+++ b/Controllers/UserPreferencesController.cs
@@ -35,9 +35,9 @@ public async Task<IReadOnlyList<UserPreferences>> Get()
 
         // POST api/UserPreferences/create
         [HttpPost("create")]
-        public async Task Create([FromBody] UserPreferences userPreferneces)
+        public async Task<Guid> Create([FromBody] UserPreferences userPreferneces)
         {
-            await userpreferencesService.CreateUserPreferencesAsync(userPreferneces);
+            return await userpreferencesService.CreateUserPreferencesAsync(userPreferneces);
         }
 
         // PUT api/UserPreferences/5
diff --git a/Services/FamilyMechListService.cs b/Services/FamilyMechListService.cs
index 1505b38..06b06b8 100644
--- a/Services/FamilyMechListService.cs
+++ b/Services/FamilyMechListService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<FamilyMechList>> GetFamilyMechListsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateFamilyMechListAsync(FamilyMechList newFamilyMechList)
+        public async Task<Guid> CreateFamilyMechListAsync(FamilyMechList newFamilyMechList)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreateFamilyMechListAsync(FamilyMechList newFamilyMechList)
             command.Parameters.AddWithValue("@version", newFamilyMechList.version);
 
             await command.ExecuteNonQueryAsync();
+
+            return familyMechListID;
         }
         public async Task UpdateFamilyMechListAsync(FamilyMechList familyMechList)
         {
diff --git a/Services/FamilyMechListVersionService.cs b/Services/FamilyMechListVersionService.cs
index 1b063f0..925bad2 100644
--- a/Services/FamilyMechListVersionService.cs
+++ b/Services/FamilyMechListVersionService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<FamilyMechListVersion>> GetFamilyMechListVersion
             return result.FirstOrDefault();
         }
 
-        public async Task CreateFamilyMechListVersionAsync(FamilyMechListVersion newFamilyMechListVersion)
+        public async Task<Guid> CreateFamilyMechListVersionAsync(FamilyMechListVersion newFamilyMechListVersion)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -46,6 +46,8 @@ public async Task CreateFamilyMechListVersionAsync(FamilyMechListVersion newFami
             command.Parameters.AddWithValue("@datetime", newFamilyMechListVersion.datetime);
 
             await command.ExecuteNonQueryAsync();
+
+            return familyMechListVersionID;
         }
         public async Task UpdateFamilyMechListVersionAsync(FamilyMechListVersion familyMechListVersion)
         {
diff --git a/Services/FamilyService.cs b/Services/FamilyService.cs
index d43e2a8..b48b6bb 100644
--- a/Services/FamilyService.cs
+++ b/Services/FamilyService.cs
@@ -29,7 +29,7 @@ public async Task<IReadOnlyList<Family>> GetFamiliesAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateFamilyAsync(string name)
+        public async Task<Guid> CreateFamilyAsync(string name)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -42,6 +42,8 @@ public async Task CreateFamilyAsync(string name)
             command.Parameters.AddWithValue("@name", name);
 
             await command.ExecuteNonQueryAsync();
+
+            return familyID;
         }
         public async Task UpdateFamilyAsync(Family family)
         {
diff --git a/Services/MechTagMechListService.cs b/Services/MechTagMechListService.cs
index cbf1b1a..0516b06 100644
--- a/Services/MechTagMechListService.cs
+++ b/Services/MechTagMechListService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<MechTagMechList>> GetMechTagMechsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateMechTagMechAsync(MechTagMechList newMechTagMech)
+        public async Task<Guid> CreateMechTagMechAsync(MechTagMechList newMechTagMech)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreateMechTagMechAsync(MechTagMechList newMechTagMech)
             command.Parameters.AddWithValue("@version", newMechTagMech.version);
 
             await command.ExecuteNonQueryAsync();
+
+            return mechTagMechID;
         }
         public async Task UpdateMechTagMechAsync(MechTagMechList mechTagMech)
         {
diff --git a/Services/MechTagMechListVersionService.cs b/Services/MechTagMechListVersionService.cs
index eb136b2..8ab434d 100644
--- a/Services/MechTagMechListVersionService.cs
+++ b/Services/MechTagMechListVersionService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<MechTagMechListVersion>> GetMechTagMechListVersi
             return result.FirstOrDefault();
         }
 
-        public async Task CreateMechTagMechListVersionAsync(MechTagMechListVersion newMechTagMechListVersion)
+        public async Task<Guid> CreateMechTagMechListVersionAsync(MechTagMechListVersion newMechTagMechListVersion)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -46,6 +46,8 @@ public async Task CreateMechTagMechListVersionAsync(MechTagMechListVersion newMe
             command.Parameters.AddWithValue("@datetime", newMechTagMechListVersion.datetime);
 
             await command.ExecuteNonQueryAsync();
+
+            return mechTagMechListVersionID;
         }
         public async Task UpdateMechTagMechListVersionAsync(MechTagMechListVersion mechTagMechListVersion)
         {
diff --git a/Services/MechanismService.cs b/Services/MechanismService.cs
index 4f7ff8b..6e7e0f0 100644
--- a/Services/MechanismService.cs
+++ b/Services/MechanismService.cs
@@ -40,7 +40,7 @@ public async Task<IReadOnlyList<Mechanism>> GetMechanismsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateMechanismAsync(string name)
+        public async Task<Guid> CreateMechanismAsync(string name)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -53,6 +53,8 @@ public async Task CreateMechanismAsync(string name)
             command.Parameters.AddWithValue("@name", name);
 
             await command.ExecuteNonQueryAsync();
+
+            return mechanismID;
         }
         public async Task UpdateMechanismAsync(Mechanism mechanism)
         {
diff --git a/Services/PropertyListService.cs b/Services/PropertyListService.cs
index 88f8687..378a630 100644
--- a/Services/PropertyListService.cs
+++ b/Services/PropertyListService.cs
@@ -29,7 +29,7 @@ public async Task<IReadOnlyList<PropertyList>> GetPropertyListsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreatePropertyListAsync(PropertyList userPreferences)
+        public async Task<Guid> CreatePropertyListAsync(PropertyList userPreferences)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreatePropertyListAsync(PropertyList userPreferences)
             command.Parameters.AddWithValue("@version", userPreferences.version);
 
             await command.ExecuteNonQueryAsync();
+
+            return userPreferencesID;
         }
         public async Task UpdatePropertyListAsync(PropertyList userPreferences)
         {
diff --git a/Services/PropertyTypeService.cs b/Services/PropertyTypeService.cs
index fc06e21..4f4252d 100644
--- a/Services/PropertyTypeService.cs
+++ b/Services/PropertyTypeService.cs
@@ -29,7 +29,7 @@ public async Task<IReadOnlyList<PropertyType>> GetPropertyTypesAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreatePropertyTypeAsync(PropertyType propertyType)
+        public async Task<Guid> CreatePropertyTypeAsync(PropertyType propertyType)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -44,6 +44,8 @@ public async Task CreatePropertyTypeAsync(PropertyType propertyType)
             command.Parameters.AddWithValue("@validation", propertyType.validation);
 
             await command.ExecuteNonQueryAsync();
+
+            return propertytypeID;
         }
         public async Task UpdatePropertyTypeAsync(PropertyType propertyType)
         {
diff --git a/Services/PropertyVersionService.cs b/Services/PropertyVersionService.cs
index eecb2e6..10dae27 100644
--- a/Services/PropertyVersionService.cs
+++ b/Services/PropertyVersionService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<PropertyVersion>> GetPropertyVersionsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreatePropertyVersionAsync(PropertyVersion newPropertyVersion)
+        public async Task<Guid> CreatePropertyVersionAsync(PropertyVersion newPropertyVersion)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -53,6 +53,8 @@ public async Task CreatePropertyVersionAsync(PropertyVersion newPropertyVersion)
             command.Parameters.AddWithValue("@datetime", newPropertyVersion.datetime);
 
             await command.ExecuteNonQueryAsync();
+
+            return propertyVersionID;
         }
         public async Task UpdatePropertyVersionAsync(PropertyVersion propertyVersion)
         {
diff --git a/Services/ReactionService.cs b/Services/ReactionService.cs
index 409b066..775cc96 100644
--- a/Services/ReactionService.cs
+++ b/Services/ReactionService.cs
@@ -42,7 +42,7 @@ public async Task<IReadOnlyList<Reaction>> GetReactionsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateReactionAsync(string type)
+        public async Task<Guid> CreateReactionAsync(string type)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -55,6 +55,8 @@ public async Task CreateReactionAsync(string type)
             command.Parameters.AddWithValue("@type", type);
 
             await command.ExecuteNonQueryAsync();
+
+            return reactionID;
         }
         public async Task UpdateReactionAsync(Reaction reaction)
         {
diff --git a/Services/ReactionSpeciesListService.cs b/Services/ReactionSpeciesListService.cs
index d3f805e..709a069 100644
--- a/Services/ReactionSpeciesListService.cs
+++ b/Services/ReactionSpeciesListService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<ReactionSpeciesList>> GetReactionSpeciesListsAsy
             return result.FirstOrDefault();
         }
 
-        public async Task CreateReactionSpeciesListAsync(ReactionSpeciesList newReactionSpeciesList)
+        public async Task<Guid> CreateReactionSpeciesListAsync(ReactionSpeciesList newReactionSpeciesList)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreateReactionSpeciesListAsync(ReactionSpeciesList newReaction
             command.Parameters.AddWithValue("@version", newReactionSpeciesList.version);
 
             await command.ExecuteNonQueryAsync();
+
+            return reactionSpeciesListID;
         }
         public async Task UpdateReactionSpeciesListAsync(ReactionSpeciesList reactionSpeciesList)
         {
diff --git a/Services/ReactionSpeciesListVersionService.cs b/Services/ReactionSpeciesListVersionService.cs
index f2cea0f..a3c7379 100644
--- a/Services/ReactionSpeciesListVersionService.cs
+++ b/Services/ReactionSpeciesListVersionService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<ReactionSpeciesListVersion>> GetReactionSpeciesL
             return result.FirstOrDefault();
         }
 
-        public async Task CreateReactionSpeciesListVersionAsync(ReactionSpeciesListVersion newReactionSpeciesListVersion)
+        public async Task<Guid> CreateReactionSpeciesListVersionAsync(ReactionSpeciesListVersion newReactionSpeciesListVersion)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -46,6 +46,8 @@ public async Task CreateReactionSpeciesListVersionAsync(ReactionSpeciesListVersi
             command.Parameters.AddWithValue("@datetime", newReactionSpeciesListVersion.datetime);
 
             await command.ExecuteNonQueryAsync();
+
+            return reactionSpeciesListVersionID;
         }
         public async Task UpdateReactionSpeciesListVersionAsync(ReactionSpeciesListVersion reactionSpeciesListVersion)
         {
diff --git a/Services/SpeciesService.cs b/Services/SpeciesService.cs
index be07105..152ab25 100644
--- a/Services/SpeciesService.cs
+++ b/Services/SpeciesService.cs
@@ -41,7 +41,7 @@ public async Task<IReadOnlyList<Species>> GetSpeciesAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateSpeciesAsync(string type)
+        public async Task<Guid> CreateSpeciesAsync(string type)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -54,6 +54,8 @@ public async Task CreateSpeciesAsync(string type)
             command.Parameters.AddWithValue("@type", type);
 
             await command.ExecuteNonQueryAsync();
+
+            return speciesID;
         }
         public async Task UpdateSpeciesAsync(Species species)
         {
diff --git a/Services/TagMechanismReactionListService.cs b/Services/TagMechanismReactionListService.cs
index c68f815..927fff5 100644
--- a/Services/TagMechanismReactionListService.cs
+++ b/Services/TagMechanismReactionListService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<TagMechanismReactionList>> GetTagMechanismReacti
             return result.FirstOrDefault();
         }
 
-        public async Task CreateTagMechanismReactionAsync(TagMechanismReactionList newTagMechanismReaction)
+        public async Task<Guid> CreateTagMechanismReactionAsync(TagMechanismReactionList newTagMechanismReaction)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreateTagMechanismReactionAsync(TagMechanismReactionList newTa
             command.Parameters.AddWithValue("@version", newTagMechanismReaction.version);
 
             await command.ExecuteNonQueryAsync();
+
+            return tagMechanismReactionID;
         }
         public async Task UpdateTagMechanismReactionAsync(TagMechanismReactionList tagMechanismReaction)
         {
diff --git a/Services/TagMechanismReactionListVersionService.cs b/Services/TagMechanismReactionListVersionService.cs
index 78eb692..7177459 100644
--- a/Services/TagMechanismReactionListVersionService.cs
+++ b/Services/TagMechanismReactionListVersionService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<TagMechanismReactionListVersion>> GetTagMechanis
             return result.FirstOrDefault();
         }
 
-        public async Task CreateTagMechanismReactionListVersionAsync(TagMechanismReactionListVersion newTagMechanismReactionListVersion)
+        public async Task<Guid> CreateTagMechanismReactionListVersionAsync(TagMechanismReactionListVersion newTagMechanismReactionListVersion)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -46,6 +46,8 @@ public async Task CreateTagMechanismReactionListVersionAsync(TagMechanismReactio
             command.Parameters.AddWithValue("@datetime", newTagMechanismReactionListVersion.datetime);
 
             await command.ExecuteNonQueryAsync();
+
+            return tagMechanismReactionListVersionID;
         }
         public async Task UpdateTagMechanismReactionListVersionAsync(TagMechanismReactionListVersion tagMechanismReactionListVersion)
         {
diff --git a/Services/TagMechanismService.cs b/Services/TagMechanismService.cs
index dfdb704..c469602 100644
--- a/Services/TagMechanismService.cs
+++ b/Services/TagMechanismService.cs
@@ -41,7 +41,7 @@ public async Task<IReadOnlyList<TagMechanism>> GetTagMechanismsAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateTagMechanismAsync(string tag)
+        public async Task<Guid> CreateTagMechanismAsync(string tag)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -54,6 +54,8 @@ public async Task CreateTagMechanismAsync(string tag)
             command.Parameters.AddWithValue("@tag", tag);
 
             await command.ExecuteNonQueryAsync();
+
+            return tagMechanismID;
         }
         public async Task UpdateTagMechanismAsync(TagMechanism tagMechanism)
         {
diff --git a/Services/TagMechanismSpeciesListService.cs b/Services/TagMechanismSpeciesListService.cs
index 76d111e..a9db86d 100644
--- a/Services/TagMechanismSpeciesListService.cs
+++ b/Services/TagMechanismSpeciesListService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<TagMechanismSpeciesList>> GetTagMechanismSpecies
             return result.FirstOrDefault();
         }
 
-        public async Task CreateTagMechanismSpeciesAsync(TagMechanismSpeciesList newTagMechanismSpecies)
+        public async Task<Guid> CreateTagMechanismSpeciesAsync(TagMechanismSpeciesList newTagMechanismSpecies)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreateTagMechanismSpeciesAsync(TagMechanismSpeciesList newTagM
             command.Parameters.AddWithValue("@version", newTagMechanismSpecies.version);
 
             await command.ExecuteNonQueryAsync();
+
+            return tagMechanismSpeciesID;
         }
         public async Task UpdateTagMechanismSpeciesAsync(TagMechanismSpeciesList tagMechanismSpecies)
         {
diff --git a/Services/TagMechanismSpeciesListVersionService.cs b/Services/TagMechanismSpeciesListVersionService.cs
index 120d059..6666b2c 100644
--- a/Services/TagMechanismSpeciesListVersionService.cs
+++ b/Services/TagMechanismSpeciesListVersionService.cs
@@ -28,7 +28,7 @@ public async Task<IReadOnlyList<TagMechanismSpeciesListVersion>> GetTagMechanism
             return result.FirstOrDefault();
         }
 
-        public async Task CreateTagMechanismSpeciesListVersionAsync(TagMechanismSpeciesListVersion newTagMechanismSpeciesListVersion)
+        public async Task<Guid> CreateTagMechanismSpeciesListVersionAsync(TagMechanismSpeciesListVersion newTagMechanismSpeciesListVersion)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -46,6 +46,8 @@ public async Task CreateTagMechanismSpeciesListVersionAsync(TagMechanismSpeciesL
             command.Parameters.AddWithValue("@datetime", newTagMechanismSpeciesListVersion.datetime);
 
             await command.ExecuteNonQueryAsync();
+
+            return tagMechanismSpeciesListVersionID;
         }
         public async Task UpdateTagMechanismSpeciesListVersionAsync(TagMechanismSpeciesListVersion tagMechanismSpeciesListVersion)
         {
diff --git a/Services/UserPreferencesService.cs b/Services/UserPreferencesService.cs
index b64bd72..4b27547 100644
--- a/Services/UserPreferencesService.cs
+++ b/Services/UserPreferencesService.cs
@@ -29,7 +29,7 @@ public async Task<IReadOnlyList<UserPreferences>> GetUserPreferencesAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateUserPreferencesAsync(UserPreferences userPreferences)
+        public async Task<Guid> CreateUserPreferencesAsync(UserPreferences userPreferences)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -43,6 +43,8 @@ public async Task CreateUserPreferencesAsync(UserPreferences userPreferences)
             command.Parameters.AddWithValue("@preferences", userPreferences.preferences);
 
             await command.ExecuteNonQueryAsync();
+
+            return userPreferencesID;
         }
         public async Task UpdateUserPreferencesAsync(UserPreferences userPreferences)
         {
diff --git a/Services/UserService.cs b/Services/UserService.cs
index 39b9aa4..7b64a3f 100644
--- a/Services/UserService.cs
+++ b/Services/UserService.cs
@@ -29,7 +29,7 @@ public async Task<IReadOnlyList<User>> GetUsersAsync()
             return result.FirstOrDefault();
         }
 
-        public async Task CreateUserAsync(string log_in_info)
+        public async Task<Guid> CreateUserAsync(string log_in_info)
         {
             using var connection = await database.OpenConnectionAsync();
             using var command = connection.CreateCommand();
@@ -42,6 +42,8 @@ public async Task CreateUserAsync(string log_in_info)
             command.Parameters.AddWithValue("@log_in_info", log_in_info);
 
             await command.ExecuteNonQueryAsync();
+
+            return userID;
         }
         public async Task UpdateUserAsync(User user)
         {