private async static Task CheckForRolesAsync(User u, IEnumerable<Role> Roles)
{
var roleList = new List<Role>();
foreach (Role r in Roles)
{
if (r.Name[0] == rolePrefix && u.HasRole(r))
roleList.Add(r);
}
if (roleList.Count != 0)
await u.RemoveRoles(roleList.ToArray());
}
