fix: fixed 404 error for get_uuid & get_username

[Lucino772]

Description

This PR fixes some some issues due to a change in the return status code for the get_uuid and get_username API. Instead of a 204 response, when a value does not exists a 404 response is returned.

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 added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov]

Codecov Report

Base: 67.92% // Head: 67.96% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (17872a8) compared to base (60fc8b4).
Patch coverage: 100.00% of modified lines in pull request are covered.

❗ Current head 17872a8 differs from pull request most recent head 90c48b1. Consider uploading reports for the commit 90c48b1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #59      +/-   ##
==========================================
+ Coverage   67.92%   67.96%   +0.03%     
==========================================
  Files          27       27              
  Lines         901      902       +1     
  Branches       83       83              
==========================================
+ Hits          612      613       +1     
  Misses        269      269              
  Partials       20       20              

Impacted Files	Coverage Δ
mojang/api/auth/models.py	41.13% <ø> (ø)
mojang/api/models.py	84.25% <ø> (ø)
mojang/api/base.py	98.21% <100.00%> (ø)
mojang/api/session.py	98.79% <100.00%> (+0.01%)	⬆️

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