Fixed issues

SchengenVisaApi/ApplicationLayer/Services/Users/Models/UserModel.cs

@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+using Domains;
+
+namespace ApplicationLayer.Services.Users.Models
+{
+    public class UserModel
+    {
+        /// Unique Identifier of user
+        [Required]
+        public Guid Id { get; private set; } = Guid.NewGuid();
+
+        [Required]
+        [MaxLength(ConfigurationConstraints.EmailLength)]
+        public string Email { get; set; } = null!;
+    }
+}