Changed auth token request method to POST

[Diveafall]

🚀 🚀 Pull Request

Checklist:

• My code follows the style guidelines of this project and the Contributing document
• I have commented my code, particularly in hard-to-understand areas
• I have kept the coverage-rate up
• I have performed a self-review of my own code and resolved any problems
• I have checked to ensure there aren't any other open Pull Requests for the same change
• I have described and made corresponding changes to the relevant documentation
• New and existing unit tests pass locally with my changes

Changes

[davidbuniat]

Do not merge until all production backend related issues pass

[codecov]

Codecov Report

Merging #1440 (54dfd9c) into main (cfbe338) will increase coverage by 0.61%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1440      +/-   ##
==========================================
+ Coverage   91.50%   92.12%   +0.61%     
==========================================
  Files         175      175              
  Lines       14018    14215     +197     
==========================================
+ Hits        12827    13095     +268     
+ Misses       1191     1120      -71     

Flag	Coverage Δ
unittests	92.12% <100.00%> (+0.61%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
hub/client/client.py	95.00% <100.00%> (ø)
hub/cli/commands.py	100.00% <0.00%> (ø)
hub/api/tests/test_json.py	100.00% <0.00%> (ø)
hub/api/tests/test_text.py	100.00% <0.00%> (ø)
hub/tests/cache_fixtures.py	100.00% <0.00%> (ø)
hub/api/tests/test_events.py	100.00% <0.00%> (ø)
hub/api/tests/test_pickle.py	100.00% <0.00%> (ø)
hub/core/storage/provider.py	100.00% <0.00%> (ø)
hub/core/meta/dataset_meta.py	100.00% <0.00%> (ø)
hub/tests/dataset_fixtures.py	100.00% <0.00%> (ø)
... and 47 more

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Got a green light from Tatevik to proceed with this.