Add new utility methods to remote interface for auth purposes

[claucambra]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 28.33333% with 43 lines in your changes missing coverage. Please review.

Project coverage is 76.49%. Comparing base (3690760) to head (9c7a6b0).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
...erKit/Interface/NextcloudKit+RemoteInterface.swift	0.00%	25 Missing ⚠️
...s/NextcloudFileProviderKitTests/AccountTests.swift	0.00%	14 Missing ⚠️
...s/NextcloudFileProviderKit/Utilities/Account.swift	50.00%	2 Missing ⚠️
Tests/Interface/MockRemoteInterface.swift	84.61%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
- Coverage   76.82%   76.49%   -0.34%     
==========================================
  Files          38       38              
  Lines        8088     8136      +48     
==========================================
+ Hits         6214     6224      +10     
- Misses       1874     1912      +38     

Flag	Coverage Δ
	76.49% <28.33%> (?)

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