in Report a Bug
I attempted to like with my facebook account as a backup and got the message "account already in use" I logged out to see if it was an old account or something and clicked to log in with facebook it said "no account found would you like to create one?"
Hey there, @noahnah. If the email address you are trying to link is already associated with any of the Niantic games, it won't allow you to do so. Please get in touch with the in-app support One of our representatives will take it from there and investigate. Thank you!.