After you’ve registered your domain at Porkbun, you may want to share access to your domains with whoever is working on your website. This guide will help you invite them.
First, login to your Porkbun account.
Next, click on the (1) Account menu, and select (2) Authorized Users

Next, scroll down a little, and (3) enter the username or email address of whoever you want to share your Porkbun account with.

Finally, click the (4) Submit button.
Unless Porkbun shows you an error, you’ve finished! They’ve sent an email to the user you specified, and you can even scroll down a little to the (5) Your Authorized Users section see the status of who has access to your account:

The person you invited will need to click the link in their email from Porkbun, or log in to their account to accept the invitation. After they accept the invite, the Status column will change from PENDING to ACTIVE.