Limit access to admins only about telegram-keyboard HOT 3 CLOSED

if (admin) {
   ctx.reply('you are admin', Keyboard.reply(['Admin button']))
} else {
   ctx.reply('you are user', Keyboard.reply(['User button']))
}

const main = (ctx) => {
    if( ctx.from._is_in_admin_list ){
    return ctx.reply('Select your audio list', Keyboard.reply(['Controls'], { columns: 1 }))
}
else {
}
}

bot.use(function(ctx, next){
	if( ctx.chat.id > 0 ) return next();
		return bot.telegram.getChatAdministrators(ctx.chat.id)
		.then(function(data){
			if( !data || !data.length ) return;
			console.log('admin list:', data);
			ctx.chat._admins = data;
			ctx.from._is_in_admin_list = data.some( adm => adm.user.id === ctx.from.id );
		})
		.catch(console.log)
		.then(_ => next(ctx));
});

bot.start(main)
bot.hears('Back', main)

bot.hears('Controls', (ctx) => {
    if( ctx.from._is_in_admin_list ){
    const keyboard = Keyboard.make(["/stop","/pause","/resume","/skip"], { columns: 2 })
    return ctx.reply('Controls menu selected', Keyboard.combine(keyboard, backKeyboard).reply())
}
else {
//do nothing
}
})

bot.launch()