Add "Image" context to add images for the users

Back/skydiveLogs-api.Model/User.cs

@@ -1,4 +1,6 @@
-namespace skydiveLogs_api.Model
+using System.Collections.Generic;
+
+namespace skydiveLogs_api.Model
 {
     public class User
     {
@@ -13,5 +15,7 @@
         public string Login { get; set; }
 
         public string Password { get; set; }
+
+        public IEnumerable<Image> Images { get; set; }
     }
 }