Issue migrated from Redmine: https://redmine.postgresql.org/issues/7621
Originally created by Nikhil Mohite at 2022-08-17 10:10:40 UTC.

Mode: Server mode
Steps:

Open user management dialog

Add 2 new internal users with email addresses user-a@test.com with Administrator role and user-A@test.com with User role

It allows saving these users.

If try to login with user-A@test.com, it will login as user-a@test.com with the Administrator role, it login with the first matching email address.

Expected behavior - Email address check should be case insensitive, and should not allow adding 2 different users with the same email with different letter casing.