I\'m in the process of creating a new application and started out using EF6-rc1, Microsoft.AspNet.Identity.Core 1.0.0-rc1, Microsoft.AspNet.Identity.EntityFramework 1.0.0-rc
If you cannot find IdentityConfig.cs then replace your AccountController constructor with this code.
public AccountController(UserManager userManager) { UserManager = userManager; UserManager.UserValidator = new UserValidator(UserManager) { AllowOnlyAlphanumericUserNames = false }; }