Add setting to allow inactive users to login

[gabrielfgularte]

Issue: #745

Proposed changes

Adds a new settings ALLOW_INACTIVE_USERS_LOGIN and then check this setting on the on_complete method before the utils.user_is_active check.

Types of changes

Please check the type of change your PR introduces:

• Release (new release request)
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (PEP8, lint, formatting, renaming, etc)
• Refactoring (no functional changes, no api changes)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Build related changes (build process, tests runner, etc)
• Other (please describe):

Checklist

• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works

Other information

[gersona]

Looks good. Can you resolve the file conflict and get the tests running?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.12%. Comparing base (eeb467c) to head (e8c9d25).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #746      +/-   ##
==========================================
+ Coverage   78.10%   78.12%   +0.01%     
==========================================
  Files         354      354              
  Lines       10945    10951       +6     
  Branches      485      485              
==========================================
+ Hits         8549     8555       +6     
  Misses       2223     2223              
  Partials      173      173              

Flag	Coverage Δ
unittests	78.12% <100.00%> (+0.01%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[nijel]

Merged, thanks for your contribution!