Allow for accounts to be created/accessed with either a Username or Email Address
We are running into a limitation whereby applicants/users have a need to change their email addresses on a semi-regular basis. Researchers move institutions frequently enough and when doing so they will receive new email addresses.
This often leads to duplicate accounts if they need to reset their password and don't have access to their original email address at the previous institutions. Additionally, if they don't remember having created an account and then register under their new email address, this bypasses the duplicate check. Lastly, using the email address limits the ability to update the email address without making their account inaccessible if they aren't expecting that change.
Suggestion is to allow for the creation of a username that is unique to their account.
