All customers are sent an email with a personalized link to your billing portal when you sign up. Please be sure to accept the invite to the billing portal and you can then create a password to access your subscription management portal.
If you no longer have that email, you can use this link to sign in and manage your account:
https://www.billingportal.com/s/photofy-inc/login/password
If you have any other issues, please contact us using the "Submit a request" link at the top right.