C# Identity - forgot password email

Hi,
I am developing a project in Visual Studio 2013 with ASP.NET Identity and Visual C#. 
For this project, I have added an extra field in the registration page to allow for the entry of a username - for example "Anyhan". I have changed the code in the AccountController.cs class under the registration method in the following way:
Old code:
var user = new ApplicationUser { UserName = model.Email, Email = model.Email }; New Code:
var user = new ApplicationUser { UserName = model.UserName, Email = model.Email }; The change assigns a username, for example "Anyhan" to the UserName field in the database, along with the entered email address being added to the Email field.
My trouble is, when a user is registered, and they forget their password and wish to reset the password, the email is set using the following code in the IdentityConfi ...