Base template solution with tests, authentication, support for admin accounts, prepared tests for auth, basic error handling system used in auth.

Template/TemplateWeb/Models/ServiceResult.cs

@@ -0,0 +1,18 @@
+namespace TemplateWeb.Models;
+
+public class ServiceResult
+{
+    public bool Success { get; protected set; }
+    public string Message { get; protected set; } = string.Empty;
+
+    public static ServiceResult Ok() => new ServiceResult { Success = true };
+    public static ServiceResult Failure(string message) => new ServiceResult { Success = false, Message = message };
+}
+
+public class ServiceResult<T> : ServiceResult
+{
+    public T? Data { get; private set; }
+
+    public static ServiceResult<T> Ok(T data) => new ServiceResult<T> { Success = true, Data = data };
+    public new static ServiceResult<T> Failure(string message) => new ServiceResult<T> { Success = false, Message = message };
+}