feat: auth check endpoint

[rutajdash]

Solved or Linked Issues

Reference any and all issues solved and related to this pull request here. Mention if there are none.

Description and Changes

Please describe your pull request with all changes made.

Your checklist for this pull request

🚨Please review the guidelines for contributing to this repository.

• Make sure you are requesting to pull a work/topic/feature/bugfix branch (right side). Don't request your default branch!
• Make sure you are making a pull request against the development (left side). Also you should start your branch off default branch and follow the branch naming guidelines.
• Check the commit's or even all commits' message styles matches our requested structure.
• Check your code additions will fail neither code linting checks nor unit test.
• I have added necessary documentation and mentioned the related issues (if appropriate)
• I have added the appropriate labels, requested a review from a repository manager and assigned myself to this pull request.

Post merge checklist

• Follow steps from the guidelines for contributing to this repository.