Level 1 - Hint 3
You should see the environmental variables in the crash from https://2rfismmoo8.execute-api.us-east-1.amazonaws.com/default/level1?code=a.
Within there you should see variables for AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_SESSION_TOKEN. With the AWS CLI installed, you can configure your terminal to use those values as shown here.
Use those to try to find the next level.