added mfa docs

docs/index.md

@@ -24,7 +24,7 @@ To authenticate CloudQuery with your AWS account you can use any of the followin
 
 ## Configuration
 
-The following configuration section can be automaticlly generated by `cloudquery init aws`:
+The following configuration section can be automatically generated by `cloudquery init aws`:
 
 ```hcl
 provider "aws" {
@@ -48,15 +48,15 @@ provider "aws" {
 }
 ```
 
-By default cloudquery will fetch all configuration from **all** resources in **all** regions in the **default** account. You can change this behaviour with the following arguments:
+By default, cloudquery will fetch all configuration from **all** resources in **all** regions in the **default** account. You can change this behaviour with the following arguments:
 
 ### Arguments
 
 - `accounts` **(Optional)** - Specify multiple accounts to fetch data from them concurrently and then query across accounts. The default configured account should be able [AssumeRole](https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html) to the specified accounts.
 - `regions` **(Optional)** - limit fetching to specific regions.
 - `max_retries` **(Optional)** - The maximum number of times that a request will be retried for failures. Defaults to 5 retry attempts.
 - `max_backoff` **(Optional)** - The maximum back off delay between attempts. The backoff delays exponentially with a jitter based on the number of attempts. Defaults to 60 seconds.
-- `aws_debug` **(Optiona)** - This will print very verbose/debug output from AWS SDK. Defaults to false.
+- `aws_debug` **(Optional)** - This will print very verbose/debug output from AWS SDK. Defaults to false.
 
 ### Assume Role
 
@@ -80,6 +80,23 @@ provider "aws" {
 }
 ```
 
+### Assume Role with MFA
+
+In order to assume role with MFA, you need to request temporary credentials using STS "get-session-token".
+
+```bash
+aws sts get-session-token --serial-number <YOUR_MFA_SERIAL_NUMBER> --token-code <YOUR_MFA_TOKEN_CODE> --duration-seconds 3600
+```
+
+export the temporary credentials to your environment variables.
+
+```bash
+export AWS_ACCESS_KEY_ID=<YOUR_ACCESS_KEY_ID>
+export AWS_SECRET_ACCESS_KEY=<YOUR_SECRET_ACCESS_KEY>
+export AWS_SESSION_TOKEN=<YOUR_SESSION_TOKEN>
+```
+
+
 ## Query Examples
 
 ### Find all public facing load balancers