Why get_user_by username not email?

Hey,

I’ve edited the plugin callback.php to use $user = get_user_by( 'email', $user_info->user_email ); rather than $user = get_user_by( 'login', $user_info->user_login );.

I consider the user’s email as their canonical identifier across the sites. I’m not sure why you decided to enforce matched usernames. Hoping I’m not missing something here.

Brian.