MembershipCreateUserException - The username supplied is invalid

Question

On this line i am getting an exception -

OAuthWebSecurity.CreateOrUpdateAccount(provider, providerUserId, model.UserName);

System.Web.Security

Answer 1

For me, this error happened in my Seed override. As rgnever pointed the username not existing is referring to the UserProfile table. To fix it the User and Account have to be created first before creating the OAuth.

So, instead of my Seed override ONLY calling:

membership.CreateOrUpdateOAuthAccount(provider, providerid, providername);

it now calls:

membership.CreateUserAndAccount(providername, null);
membership.CreateOrUpdateOAuthAccount(provider, providerid, providername);

Note: The null password means the user cannot log in via a login form because the supplied password will never be null. I'm only using OAuth so it's not an issue for me.