Add register page, associated view model and successfully call service that just sends back received data

Models/ViewModels/UserRegister.cs

@@ -0,0 +1,10 @@
+namespace Sandbox.Models.ViewModels;
+
+public class UserRegister
+{
+    public string Email { get; set; } = string.Empty;
+    //[Required, StringLength(100, MinimumLength = 5)]
+    public string Password { get; set; } = string.Empty;
+    //[Compare("Password", ErrorMessage = "The password do not match.")]
+    public string ConfirmPassword { get; set; } = string.Empty;
+}