I have a user with the following properties:
After some tests, we discovered that they were able to log in with only
myusername in the Username field of the login form and their corresponding password.
How did it make the link to the account? Is it somehow with the firstname or lastname fields? Is it because it’s the only profile with
myusername as email prefix? If this is the case, what happens if we have two accounts like
In any case, I haven’t found a way to disable this in the interface, and I would rather disable this behaviour.