Implemented admin users crud api

Moonlight.Shared/Http/Requests/Admin/Users/UpdateUserRequest.cs

@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Moonlight.Shared.Http.Requests.Admin.Users;
+
+public class UpdateUserRequest
+{
+    [Required(ErrorMessage = "You need to provide an email address")]
+    [EmailAddress(ErrorMessage = "You need to provide a valid email address")]
+    public string Email { get; set; }
+    
+    [Required(ErrorMessage = "You need to provide a username")]
+    [RegularExpression("^[a-z][a-z0-9]*$", ErrorMessage = "Usernames can only contain lowercase characters and numbers and should not start with a number")]
+    public string Username { get; set; }
+    
+    public string? Password { get; set; }
+}