Resolve "Revert "Support custom authentication backends" wasn't done cleanly"

Closes #521 (closed)

added part::backend type::bug labels

assigned to @hansegucker

added 2 commits

• 84434336 - Remove leftovers of custom authentication backends and alternative login views
• a562f8f0 - Update changelog

Compare with previous version

assigned to @nik and unassigned @hansegucker

marked this merge request as ready

merged

mentioned in commit 274cebd3