Subscriber access will be granted to the email account linked to the subscription plan.
For example, if the email you registered for the subscription plan is Google account "aaa@email.com" but you log with another Google account "bbb@email.com,” the subscriber access/services will only be available when you log in with "aaa@email.com."
In this case, if you sign in with bbb@email.com, your status will be that of a non-paying member.