public async Task AddToGang(IGuildUser user)
{
if (GangRepository.InGang(user.Id, Context.Guild.Id))
{
throw new Exception("This user is already in a gang.");
}
if (GangRepository.IsFull(Context.User.Id, Context.Guild.Id))
{
throw new Exception("Your gang is already full!");
}
GangRepository.AddMember(Context.User.Id, Context.Guild.Id, user.Id);
await ReplyAsync($"{user} is now a new member of your gang!");
var channel = await user.CreateDMChannelAsync();
await channel.SendMessageAsync($"Congrats! You are now a member of {GangRepository.FetchGang(Context).Name}!");
}