ASP.NET MVC 4 - Simple Membership, Facebook login broken when using Email instead of Username

Question

I have a Code First MVC 4 App, I have swapped Username for Email in SimpleMembership - which works fine.

I do that by changing Initialization to this:

// Initialize database for Account
WebSecurity.InitializeDatabaseConnection("MyEntities", "Users", "UserId", "Email", autoCreateTables: true);

I have a Facebook App which I want to use for login. I have tested this on a vanilla (username based) Simple Membership site and it works fine.

However, when I try and login using the Email/Password Simple Membership MVC 4 site - it works as far as this:

Associate your Facebook account.
Association Form
You've successfully authenticated with Facebook. Please enter a user name for this site below and click the Confirm button to finish logging in.

no matter what I enter here - I get this error:

"The username supplied is invalid."

db.UserProfiles.Add(new UserProfile { UserName = model.UserName });
db.SaveChanges();
OAuthWebSecurity.CreateOrUpdateAccount(provider, providerUserId, model.UserName);

Any idea how I can get this to work (and secondarily request both a username and an email at this stage - or an email only if that's easier). Thanks.

Answer 1

I fixed it by adding an email field to the confirmation form - then changing the code to this:

db.UserProfiles.Add(new UserProfile { UserName = model.UserName, Email = model.Email });
db.SaveChanges();
OAuthWebSecurity.CreateOrUpdateAccount(provider, providerUserId, model.Email);