feat(disable users) - move User services to a separate file
remove services dependency on signals
feat(disable user) - prohibit login after user disabled
feat(disable user) - send email notification on user status change
Merge pull request #297 from amagdas/disable-user

feat(disable user)
fix(tasks) - use archive endpoint. Enable _etag
Merge pull request #299 from amagdas/fix-tasks

fix(tasks) - use archive endpoint. Enable _etag