add ability to buy vehicle for faction and group

ReallifeGamemode.Server/Extensions/ClientExtension.cs

@@ -33,6 +33,7 @@ namespace ReallifeGamemode.Server.Extensions
                         .Users
                         .Include(u => u.Faction)
                         .Include(u => u.FactionRank)
+                        .Include(u => u.Group)
                         .Where(u => u.Name == client.Name)
                         .FirstOrDefault();
                 }