refactor (readonly for static objects in tests and file-scoped namespaces

SchengenVisaApi/BlazorWebAssemblyVisaApiClient/Validation/Applicants/Models/RegisterRequestModel.cs

@@ -1,13 +1,12 @@
 using System.ComponentModel.DataAnnotations;
 using VisaApiClient;
 
-namespace BlazorWebAssemblyVisaApiClient.Validation.Applicants.Models
+namespace BlazorWebAssemblyVisaApiClient.Validation.Applicants.Models;
+
+/// Model of request with attributes required for validation to work
+public class RegisterRequestModel
 {
-    /// Model of request with attributes required for validation to work
-    public class RegisterRequestModel
-    {
-        [Required]
-        [ValidateComplexType]
-        public AuthData AuthData { get; set; } = new AuthData();
-    }
-}
+    [Required]
+    [ValidateComplexType]
+    public AuthData AuthData { get; set; } = new AuthData();
+}