fix: issue with the status code for get_uuid & get_username

[Lucino772]

Description

This PR fixes some issues with the status code returned by the APIs for the get_uuid and get_username functions. Instead of returning 404 when value does not exists, the APIs returns 204.

Type of change

• 🪳 Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes

[codecov]

Codecov Report

Base: 67.96% // Head: 67.96% // No change to project coverage 👍

Coverage data is based on head (61f51da) compared to base (efede91).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 61f51da differs from pull request most recent head 426d621. Consider uploading reports for the commit 426d621 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #61   +/-   ##
=======================================
  Coverage   67.96%   67.96%           
=======================================
  Files          27       27           
  Lines         902      902           
  Branches       83       83           
=======================================
  Hits          613      613           
  Misses        269      269           
  Partials       20       20           

Impacted Files	Coverage Δ
mojang/api/base.py	98.21% <100.00%> (ø)

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