Hello,

i am try to implement Azure AD in umbraco in UmbracoADAuthExtensions.cs.
i am using umbraco version="7.12.4"
i got an error in GetUserTypeByName shows error like

" Iuserservice does not contain a definition for 'IUserService' does not contain a definition for 'GetUserTypeByName' and no accessible extension method 'GetUserTypeByName' accepting a first argument of type 'IUserService' could be found (are you missing a using directive or an assembly reference?)

var writerUserType = userService.GetUserTypeByName("writer");
Can anyone please tell me what wrong ? Thank you.

 var adOptions = new OpenIdConnectAuthenticationOptions
            {
                SignInAsAuthenticationType = Constants.Security.BackOfficeExternalAuthenticationType,
                ClientId = clientId,
                Authority = authority,
                RedirectUri = postLoginRedirectUri,
                AuthenticationMode = AuthenticationMode.Passive,
                Notifications = new OpenIdConnectAuthenticationNotifications
                {
                    AuthorizationCodeReceived = async context =>
                    {
                        var userService = ApplicationContext.Current.Services.UserService;

                        var email = context.JwtSecurityToken.Claims.First(x => x.Type == "email").Value;
                        var issuer = context.JwtSecurityToken.Claims.First(x => x.Type == "iss").Value;
                        var providerKey = context.JwtSecurityToken.Claims.First(x => x.Type == "sub").Value;
                        var name = context.JwtSecurityToken.Claims.First(x => x.Type == "name").Value;
                        var userManager = context.OwinContext.GetUserManager<BackOfficeUserManager>();

                        var user = userService.GetByEmail(email);

                        if (user == null)
                        {
                            var writerUserType = userService.GetUserTypeByName("writer");
                            user = userService.CreateUserWithIdentity(email, email, writerUserType);
                        }

                        var identity = await userManager.FindByEmailAsync(email);
                        if (identity.Logins.All(x => x.ProviderKey != providerKey))
                        {
                            identity.Logins.Add(new IdentityUserLogin(issuer, providerKey, user.Id));
                            identity.Name = name;
                            await userManager.UpdateAsync(identity);
                        }
                    }
                }
            };