Merge pull request #8598 from umbraco/netcore/feature/6972-migrate-non-oauth-auth-controller

Migrates remaining non-oauth AuthenticationController actions to netcore

src/Umbraco.Web.Common/ActionsResults/ValidationErrorResult.cs

@@ -0,0 +1,22 @@
+using System.Net;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Umbraco.Web.Common.ActionsResults
+{
+    /// <summary>
+    /// Custom result to return a validation error message with a 400 http response and required headers
+    /// </summary>
+    public class ValidationErrorResult : ObjectResult
+    {
+        public ValidationErrorResult(string errorMessage) : base(new { Message = errorMessage })
+        {
+            StatusCode = (int)HttpStatusCode.BadRequest;           
+        }
+
+        public override void OnFormatting(ActionContext context)
+        {
+            base.OnFormatting(context);
+            context.HttpContext.Response.Headers["X-Status-Reason"] = "Validation failed";
+        }
+    }
+}