This article will show you how to make it so that your members can login with their email address or with their username on your phpFox website.
Login to your admincp and select Settings > Manage Settings.
On the Manage Settings screen, select User.
On the User Settings screen, scroll down to the User Login Method setting.
You can choose to make your members login their user name or with their email address. Or you can let them choose which to login with.
After making your selection, select Submit to save your changes.
You should now be able to set it so that your members can login with either their email or their user name.