Change region to 'us-east-1' and set custom exception for incomplete AWS credential steps

[LuHG18]

Change region to 'us-east-1' and set custom exception for incomplete AWS credential steps

Github Issue Number Here: #1084
Issue Description
Bug preventing access to user id tokens through the dlp-cli with unclear error message

Solution
Edited cli.py file to use the correct region (us-east-1) and added custom exception providing a more detailed error description in the case where dlp-cli user did not complete the necessary AWS credential steps.

Testing Methodology
Tested the updates by using the dlp-cli to obtain a valid id token. First by not completing the proper AWS credential steps to prompt the custom exception and second by filling out the necessary steps and successfully getting the token.

https://drive.google.com/file/d/1jThsq6Xznm4oAS_NN-o_Yt-7nBc_K5v_/view?usp=sharin

[sweep-ai]

Apply Sweep Rules to your PR?

• Apply: All new business logic should have corresponding unit tests.
• Apply: Refactor large functions to be more modular.
• Apply: Add docstrings to all functions and file headers.

[karkir0003]

@LuHG18 can you share a video recording/screen recording of you walking through the testing steps :)

[karkir0003]

left some suggestions + comment on attaching a screen recording to validate the testing steps

[karkir0003]

Thank you for this PR @LuHG18 🥳

[karkir0003]

added another comment

[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

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