public async Task Reg(string timeZone)
{
int time;
if (!int.TryParse(timeZone, out time))
{
await Context.Channel.SendMessageAsync("Wrong UTC format"); return;
}
if (time < -12 || time > 14)
{
await Context.Channel.SendMessageAsync("UTC ranging from UTC−12:00 to UTC+14:00"); return;
}
await _zones.ModifyUserTimeZone(Context.Guild.Id, Context.User.Id, time);
await Context.Channel.SendMessageAsync($"{Context.User.Username}#{Context.User.Discriminator} time zone set to: {time} UTC");
}