type MessageType = 
  | "get"
  | "off"
  | "on"
  | "ping"
  | "pong"
  | "update"
  | "connected"
  | "metadata"
  | "broadcast"
  | "send"
  | "clients"
  | "join"
  | "leave"
  | "setHost"
  | "call"
  | "call_result"
  | "validation_error";