Prompt for authentication to confirm matching with existing user on initial LTI launch (fix #36)

[dac514]

No description provided.

[codecov]

Codecov Report

Merging #47 into dev will increase coverage by 0.12%.
The diff coverage is 79.62%.

@@             Coverage Diff              @@
##                dev      #47      +/-   ##
============================================
+ Coverage     73.42%   73.55%   +0.12%     
- Complexity      281      292      +11     
============================================
  Files             9        9              
  Lines           967     1002      +35     
============================================
+ Hits            710      737      +27     
- Misses          257      265       +8

Impacted Files	Coverage Δ	Complexity Δ
inc/namespace.php	91.52% <100%> (+1.72%)	0 <0> (ø)	⬇️
inc/class-admin.php	81.74% <100%> (+0.07%)	80 <0> (+1)	⬆️
inc/class-controller.php	43.1% <55%> (-2.73%)	18 <0> (+6)
inc/class-tool.php	69.69% <90.47%> (+1.29%)	80 <5> (+4)	⬆️

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