public async Task BanUser(HttpContext context)
{
var inputDoc = await context.ReadStringAsync();
PostBan postBan = JsonConvert.DeserializeObject <PostBan>(inputDoc);
var client = postBan.ClientName;
var user = postBan.User;
var reason = postBan.Reason;
var channel = postBan.Channel;
await chatFacade.BanUser(client, user, reason, channel);
await context.RespondStringAsync(inputDoc);
}