Update about the relation column "User" for the images

and begin to add a column in "Aircraft"

Back/skydiveLogs-api.Model/Jump.cs

@@ -14,7 +14,7 @@ namespace skydiveLogs_api.Model
 
         public Gear Gear { get; set; }
 
-        public int UserId { get; set; }
+        public User User { get; set; }
 
         public int ExitAltitude { get; set; }