Many websites use email addresses as the login username.

My site was populating the email address into the username field to allow this to happen, but we just ran into the issue that apostrophes, and some other special characters, are not allowed characters in the username field.

I have read in the forum that we can modify the logon web part to leverage the email address field instead of the username field.

But since many websites use this as a standard, should Kentico provide it as a built in feature? Since some sites may prefer to use a different username instead, it would be great if Kentico provided a configuration item that would allow users to login with email address. Some may sites may even want the ability to login with the possibility of using either at any given time (although I don't need it myself).