add lazy loading for entities

ReallifeGamemode.Server/Entities/GroupBankAccount.cs

@@ -13,7 +13,7 @@ namespace ReallifeGamemode.Server.Entities
         [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         public int Id { get; set; }
 
-        public Group Group { get; set; }
+        public virtual Group Group { get; set; }
 
         public int Balance { get; set; }
     }