Actually, IFTTT has their own account system, so that if we wanna integrate Wio Link to IFTTT, we need to bind Wio Link and IFTTT.
“Login Page Seeed Wio Link” just tell IFTTT how to accessing your Wio Link and Grove. You need to login when you connect Seeed channel at first time. Just like you login other third-party web service with Google Account.
If you got some troubles, the best way is try again 