feat(auth): add user information update feature and refactor the authentication service.

Models/Request/Auth/UpdateUserRequest.cs

@@ -0,0 +1,17 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Foxel.Models.Request.Auth;
+
+public class UpdateUserRequest
+{
+    [StringLength(50)]
+    public string? UserName { get; set; }
+
+    [EmailAddress]
+    public string? Email { get; set; }
+    
+    public string? CurrentPassword { get; set; }
+    
+    [StringLength(20, MinimumLength = 6)]
+    public string? NewPassword { get; set; }
+}