An error occurred (InvalidClientTokenId) when calling the DescribeDBInstances operation: The security token included in the request is invalid.
coder@bb5c5aa3e2e0:~/project$
the first command is not executing. Please help me!
For other learners who might run into this issue: This is usually temporary. Click the Help (?) button on the upper right then click Reboot. This will reset the lab and might take a few minutes. After that, the command should now work and give you a valid endpoint. If it still fails after that, then you can report here so the staff can check.