More api unit tests

[xxami]

covered list in some more details and added tests for find and login, still working on other stuff but need to get my late hacktoberfest prs in lol

[codecov-io]

Codecov Report

Merging #70 into master will increase coverage by 13.06%. The diff coverage is 100%.

@@             Coverage Diff             @@
##           master      #70       +/-   ##
===========================================
+ Coverage   63.02%   76.09%   +13.06%     
===========================================
  Files           9        9               
  Lines         238      297       +59     
===========================================
+ Hits          150      226       +76     
+ Misses         88       71       -17

Impacted Files	Coverage Δ
tests/list_response_builder.py	100% <ø> (ø)	:arrow_up:
tests/test_api.py	100% <100%> (ø)	:arrow_up:
mal/utils.py	51.11% <0%> (+8.88%)	:arrow_up:
mal/api.py	80.26% <0%> (+17.1%)	:arrow_up:

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[ryukinix]

Thank you!

[ryukinix]

Related to #13