I have a simple passport router like this
app.get('/auth/facebook',
passport.authenticate('facebook',{ scope: ['user_likes', 'user_location'],
session: true
})
);
app.get('/auth/facebook/callback',
passport.authenticate('facebook'), (req, res) => {
var messengerApp = 'https://m.me/appUserName';
res.redirect(messengerApp || '/');
});
app.get('/', function( req, res ){
res.header( 'Content-Type', 'text/html' );
res.status(200).send('<html><body><a href="/auth/facebook">Login with Facebook</a></body></html>');
});
This code will redirect the user to Messenger but skip the Login part. If I erase messengerApp ||, the code will redirect to the login button, but once the button is clicked the user is rediected to the same login button page '/'.
How can I redirect the user to the conversation he has with my Bot on Messenger?