public AccountController(SignInManager <ApplicationUser> SignInManager, UserManager <ApplicationUser> UserManager, ExternalAuthData.ExternalAuthContext DbContext)
 {
     _signInManager = SignInManager;
     _userManager   = UserManager;
     Context        = DbContext;
 }
 public UserStore(ExternalAuthData.ExternalAuthContext DbContext)
 {
     dbcontext = DbContext;
 }