If you are looking to transfer your certificates you would be able to follow the following steps below:
f you change your email address in HubSpot, you can transfer certifications associated with your original email address to your new email address.All certification statuses, including those in progress, will be transferred.
In your HubSpot account, click your account name in the top right corner, then click HubSpot Academy.
Click the My team tab, where you can view the certification status of all users in the account.
Locate your existing email address. Click the Manage certificates dropdown menu under the email address, then select Transfer certificates to a new email address.
In the dialog box, enter the New email address to transfer your certificates to, then click Transfer.
Thank you for letting me know! When I try and do this manually on the backend it is stating that the Gmail address is non existent. Can you let me know if there can be another email it would have been under?