Refactor api module and retry login if Unathenticated error is thrown

[audiodude]

Fixes #56

[codecov]

Codecov Report

Merging #57 into master will increase coverage by 0.04%.
The diff coverage is 92.45%.

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
+ Coverage   92.82%   92.86%   +0.04%     
==========================================
  Files          29       30       +1     
  Lines        1742     1781      +39     
==========================================
+ Hits         1617     1654      +37     
- Misses        125      127       +2

Impacted Files	Coverage Δ
wp1/tables_test.py	100% <100%> (ø)	⬆️
wp1/tables.py	100% <100%> (ø)	⬆️
wp1/api_test.py	90.9% <90.9%> (ø)
wp1/api.py	92% <91.3%> (+17%)	⬆️

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