asp.net-web-api2 OAuth 2.0 in ASP.NET Web API Storing OAuth User Profiles

Example

When someone registers with your application, a new ApplicationUser object will be stored in the database. By default the class is very barebones, but it can be customised - you can find it in Models > IdentityModels.cs. This is mine:

public class ApplicationUser : IdentityUser
{
      public string ImageUrl { get; set; }
      public DateTime DateCreated { get; set; }
      public string FirstName { get; set; }
      public string AuthProvider { get; set; }
      public string Surname { get; set; }

      public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager, string authenticationType)
      {
            // Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
            var userIdentity = await manager.CreateIdentityAsync(this, authenticationType);
            // Add custom user claims here
            return userIdentity;
      }
}

For reference, the user profile returned from Google with the Google+ API enabled takes the following JSON structure:

{{
    "id": "1****************6",
    email": "dan********@gmail.com",
    "verified_email": true,
    "name": "Dan Richardson",
    "given_name": "Dan",
    "family_name": "Richardson",
    "link": "https://plus.google.com/+DanRichardson",
    "picture": "https://lh4.googleusercontent.com/photo.jpg",
    "gender": "male",
    "locale": "en"
}}