Is linking github account to docker account a pro option

Hi,

According to this guide - Configure automated builds from GitHub and BitBucket | Docker Documentation
in order to link github account to docker hub, I need to open Linked Accounts tab in “Account Settings”, however in my settings this tab does not appear.

in this discussion - Linked accounts tab missing
it’s mentioned that this is a pro feature, but I didn’t see it mentioned anywhere else.

is it indeed only for pro users?