Break up the login flow and expose the authorization URL to the library user

[alexgolec]

…ry user

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.74%. Comparing base (eb985d3) to head (08c5858).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #174      +/-   ##
==========================================
+ Coverage   98.56%   98.74%   +0.18%     
==========================================
  Files          18       18              
  Lines        2223     2229       +6     
  Branches      230      230              
==========================================
+ Hits         2191     2201      +10     
+ Misses         21       18       -3     
+ Partials       11       10       -1     

Flag	Coverage Δ
unittests	98.74% <100.00%> (+0.18%)	⬆️

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