CB

Spaces need to be stripped from the username when using name fallback as spaces are not allowed. This results in registration always failing because the username can't have spaces, but the name can (and in some cases always) have a space.

Maybe also add a parameter to select the fallback field instead of using name (then email if name also disabled). If not at least add parameter to select fallback of name or email instead of always name. Be sure to format username fallback so it will validate (as user has no control over this like a username field).