Add descriptions to exceptions

[Raudcu]

• The repo has as dependency Flask = ">=2.0,<4.0"
• The repo also uses Werkzeug (for example in the edited file)
• Flask>=2.0 requires Werkzeug>=2.0
• When accesing an protected route the following error appears

This is because HTTPException.description can no longer be None in werkzeug 2.x (commit)

In this PR I only add a very simple description to both exceptions to avoid the errors

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (ece4645) to head (cfdfb4e). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #47 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 9 9 Lines 398 400 +2 ========================================= + Hits 398 400 +2 ```

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[mblackgeo]

Thanks!