Node.js with meteor 3-legged oauth2

i'm trying to use http://www.coinbase.com 's oauth autentication to connect with my web application on meteor, however i'm not sure on how to implement the 3-legged oauth. It's my understanding that first i have to redirect the user to the authorization page and then use a GET method to get the information that the page will return.

I tried to find some documentation on their site but all i found was this https://developers.coinbase.com/docs/wallet/coinbase-connect/integrating

Thanks.

via Oscar Or