completed antiforgery implementation, improved external login claim mapping, principal construction, and user experience

Oqtane.Shared/Enums/ExternalLoginStatus.cs

@@ -1,13 +0,0 @@
-namespace Oqtane.Shared
-{
-    public enum ExternalLoginStatus
-    {
-        Success,
-        InvalidEmail,
-        DuplicateEmail,
-        UserNotCreated,
-        UserDoesNotExist,
-        ProviderKeyMismatch,
-        VerificationRequired
-    }
-}

Oqtane.Shared/Security/UserSecurity.cs

@@ -152,14 +152,5 @@ namespace Oqtane.Security
             }
             return identity;
         }
-
-        public static void ResetClaimsIdentity(ClaimsIdentity identity)
-        {
-            var claims = identity.Claims.ToList(); // clone
-            foreach (var claim in claims)
-            {
-                identity.RemoveClaim(claim);
-            }
-        }
     }
 }

Oqtane.Shared/Shared/ExternalLoginStatus.cs

@@ -0,0 +1,13 @@
+namespace Oqtane.Shared {
+    public class ExternalLoginStatus {
+        public const string Success = "Success";
+        public const string InvalidEmail = "InvalidEmail";
+        public const string DuplicateEmail = "DuplicateEmail";
+        public const string UserNotCreated = "UserNotCreated";
+        public const string UserDoesNotExist = "UserDoesNotExist";
+        public const string ProviderKeyMismatch = "ProviderKeyMismatch";
+        public const string VerificationRequired = "VerificationRequired";
+        public const string AccessDenied = "AccessDenied";
+        public const string RemoteFailure = "RemoteFailure";
+    }
+}