* Error early if email already exists
* Update changes/issue-4361-mail-change-should-error
Co-authored-by: Michal Nicpon <39177923+michalnicp@users.noreply.github.com>
* Fix test
* Lint fixes
* Fix another test
* Also check for invites
* Improve error checks
* Update comment
* Update tests
* Fix test
Co-authored-by: Michal Nicpon <39177923+michalnicp@users.noreply.github.com>