public static async Task CreateUserWithCustomAttribute()

in 021-IdentityForApps/Student/Resources/MSGraphApp/src/Services/UserService.cs [243:331]
75 lines of code
6 McCabe index (conditional complexity)

        public static async Task CreateUserWithCustomAttribute(GraphServiceClient graphClient, string b2cExtensionAppClientId, string tenantId)
        {
            if (string.IsNullOrWhiteSpace(b2cExtensionAppClientId))
            {
                throw new ArgumentException("B2C Extension App ClientId (ApplicationId) is missing in the appsettings.json. Get it from the App Registrations blade in the Azure portal. The app registration has the name 'b2c-extensions-app. Do not modify. Used by AADB2C for storing user data.'.", nameof(b2cExtensionAppClientId));
            }

            // Declare the names of the custom attributes
            const string customAttributeName1 = "FavouriteSeason";
            const string customAttributeName2 = "LovesPets";

            // Get the complete name of the custom attribute (Azure AD extension)
            Helpers.B2cCustomAttributeHelper helper = new Helpers.B2cCustomAttributeHelper(b2cExtensionAppClientId);
            string favouriteSeasonAttributeName = helper.GetCompleteAttributeName(customAttributeName1);
            string lovesPetsAttributeName = helper.GetCompleteAttributeName(customAttributeName2);

            Console.WriteLine($"Create a user with the custom attributes '{customAttributeName1}' (string) and '{customAttributeName2}' (boolean)");

            // Fill custom attributes
            IDictionary<string, object> extensionInstance = new Dictionary<string, object>();
            extensionInstance.Add(favouriteSeasonAttributeName, "summer");
            extensionInstance.Add(lovesPetsAttributeName, true);

            try
            {
                // Create user
                var result = await graphClient.Users
                .Request()
                .AddAsync(new User
                {
                    GivenName = "Casey",
                    Surname = "Jensen",
                    DisplayName = "Casey Jensen",
                    Identities = new List<ObjectIdentity>
                    {
                        new ObjectIdentity()
                        {
                            SignInType = "emailAddress",
                            Issuer = tenantId,
                            IssuerAssignedId = "casey.jensen@example.com"
                        }
                    },
                    PasswordProfile = new PasswordProfile()
                    {
                        Password = Helpers.PasswordHelper.GenerateNewPassword(4, 8, 4)
                    },
                    PasswordPolicies = "DisablePasswordExpiration",
                    AdditionalData = extensionInstance
                });

                string userId = result.Id;

                Console.WriteLine($"Created the new user. Now get the created user with object ID '{userId}'...");

                // Get created user by object ID
                result = await graphClient.Users[userId]
                    .Request()
                    .Select($"id,givenName,surName,displayName,identities,{favouriteSeasonAttributeName},{lovesPetsAttributeName}")
                    .GetAsync();

                if (result != null)
                {
                    Console.ForegroundColor = ConsoleColor.Blue;
                    Console.WriteLine($"DisplayName: {result.DisplayName}");
                    Console.WriteLine($"{customAttributeName1}: {result.AdditionalData[favouriteSeasonAttributeName].ToString()}");
                    Console.WriteLine($"{customAttributeName2}: {result.AdditionalData[lovesPetsAttributeName].ToString()}");
                    Console.WriteLine();
                    Console.ResetColor();
                    Console.WriteLine(JsonConvert.SerializeObject(result, Formatting.Indented));
                }
            }
            catch (ServiceException ex) 
            {
                if (ex.StatusCode == System.Net.HttpStatusCode.BadRequest)
                {
                    Console.ForegroundColor = ConsoleColor.Red;
                    Console.WriteLine($"Have you created the custom attributes '{customAttributeName1}' (string) and '{customAttributeName2}' (boolean) in your tenant?");
                    Console.WriteLine();
                    Console.WriteLine(ex.Message);
                    Console.ResetColor();
                }                
            }
            catch (Exception ex)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine(ex.Message);
                Console.ResetColor();
            }
        }