Refactor JWT token generation and update password handling logic; add exception handling behavior

src/CMSMicroservice.Application/Common/Exceptions/ValidationException.cs

@@ -11,12 +11,30 @@ public class ValidationException : Exception
     }
 
     public ValidationException(IEnumerable<ValidationFailure> failures)
-        : this()
+        : base(BuildMessage(failures, out var errors))
     {
-        Errors = failures
-            .GroupBy(e => e.PropertyName, e => e.ErrorMessage)
-            .ToDictionary(failureGroup => failureGroup.Key, failureGroup => failureGroup.ToArray());
+        Errors = errors;
     }
 
     public IDictionary<string, string[]> Errors { get; }
+
+    private static string BuildMessage(IEnumerable<ValidationFailure> failures, out IDictionary<string, string[]> errors)
+    {
+        var list = failures?.Where(f => !string.IsNullOrWhiteSpace(f.ErrorMessage)).ToList() ?? new List<ValidationFailure>();
+
+        errors = list
+            .GroupBy(e => e.PropertyName, e => e.ErrorMessage)
+            .ToDictionary(failureGroup => failureGroup.Key, failureGroup => failureGroup.ToArray());
+
+        var items = list
+            .Select(f => string.IsNullOrWhiteSpace(f.PropertyName)
+                ? f.ErrorMessage
+                : $"{f.PropertyName}: {f.ErrorMessage}")
+            .Where(s => !string.IsNullOrWhiteSpace(s))
+            .ToArray();
+
+        return items.Length > 0
+            ? string.Join(" | ", items)
+            : "One or more validation failures have occurred.";
+    }
 }

src/CMSMicroservice.Application/Common/Interfaces/IGenerateJwtToken.cs

@@ -1,5 +1,5 @@
 namespace CMSMicroservice.Application.Common.Interfaces;
 public interface IGenerateJwtToken
 {
-    Task<string> GenerateJwtToken(User user);
+    Task<string> GenerateJwtToken(User user,int? expiryDays=null);
 }