Update project structure

WebAPI/Models/User.cs

@@ -0,0 +1,16 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace WebAPI.Models
+{
+    public class User
+    {
+        #region Properties
+        [Key]
+        public Guid Id { get; set; }
+        public string? Email { get; set; }
+        [StringLength(50)]
+        public string? UserName { get; set; }
+        public DateTime CreatedAt { get; set; }
+        #endregion
+    }
+}