EC-198 Added feature flag for 2FA Email for new device login (#1993)

* EC-198 added global setting flag for 2FA email on new device login feature

* EC-198 Removed is development environment check on 2FA email new device login given that we can now rely on the global settings feature flag

* EC-198 Improved IGlobalSettings and UserService code for testing

src/Core/Settings/GlobalSettings.cs

@@ -69,6 +69,7 @@ namespace Bit.Core.Settings
         public virtual AppleIapSettings AppleIap { get; set; } = new AppleIapSettings();
         public virtual SsoSettings Sso { get; set; } = new SsoSettings();
         public virtual StripeSettings Stripe { get; set; } = new StripeSettings();
+        public virtual ITwoFactorAuthSettings TwoFactorAuth { get; set; } = new TwoFactorAuthSettings();
 
         public string BuildExternalUri(string explicitValue, string name)
         {
@@ -480,5 +481,10 @@ namespace Bit.Core.Settings
             public string ApiKey { get; set; }
             public int MaxNetworkRetries { get; set; } = 2;
         }
+
+        public class TwoFactorAuthSettings : ITwoFactorAuthSettings
+        {
+            public bool EmailOnNewDeviceLogin { get; set; } = true;
+        }
     }
 }

src/Core/Settings/IGlobalSettings.cs

@@ -1,6 +1,4 @@
-using static Bit.Core.Settings.GlobalSettings;
-
-namespace Bit.Core.Settings
+namespace Bit.Core.Settings
 {
     public interface IGlobalSettings
     {
@@ -10,9 +8,11 @@ namespace Bit.Core.Settings
         string LicenseDirectory { get; set; }
         string LicenseCertificatePassword { get; set; }
         int OrganizationInviteExpirationHours { get; set; }
+        bool DisableUserRegistration { get; set; }
         IInstallationSettings Installation { get; set; }
         IFileStorageSettings Attachment { get; set; }
         IConnectionStringSettings Storage { get; set; }
         IBaseServiceUriSettings BaseServiceUri { get; set; }
+        ITwoFactorAuthSettings TwoFactorAuth { get; set; }
     }
 }

src/Core/Settings/ITwoFactorAuthSettings.cs

@@ -0,0 +1,7 @@
+namespace Bit.Core.Settings
+{
+    public interface ITwoFactorAuthSettings
+    {
+        bool EmailOnNewDeviceLogin { get; set; }
+    }
+}