I noticed when trying to add a new user OpManager does not allow a 'Username' to be specified -- OpManager instead asks for an "E-Mail ID."

How can we generate new user accounts with 'Usernames' instead of 'E-Mail ID'?

It seems the ability to provide a "Username" was removed at some point, maybe? We are running OpManager version 12.3.091.

Attached is a picture of what I'm talking about for your reference.