import { Api } from "https://dotland.deno.dev/x/grammy@v1.19.1/mod.ts";
Use this method to get the number of members in a chat. Returns Int on success.
Parameters
Unique identifier for the target chat or username of the target supergroup or channel (in the format @channelusername)
Optional AbortSignal to cancel the request
Official reference: https://core.telegram.org/bots/api#getchatmembercount