What do you suggest we fix?
If you switch from login name to email name login setting, system does not automatically use email as login name. It will use what you have left in login name fields for customers. This is important to note.
You can manage customers login fields in the admin.
Generally, it is recommended to use loginname based customer's authentication for better security.
But abantecart v.1.6 display the message "Login Name or E-Mail Address:" on the login field. It is misleading that both login name and email address can be used to login. But abantecart v.1.5 only allow email address to login.
Besides, if I need to use thrid party login extension. (login with google or facebook). They only use email address to login. Right?
What is the new standard for abantecart v.1.6. (accept both login name and email address to login or just support login name only?)
Finally, it is clear that the email address can't be used to login abantecart v.1.6 except that if I create the user login name as email address.