You have to create a separate Panasonic Comfort Cloud account. This can be done on the Panasonic website and possibly also from within the Mobile Ap (though it is likely that it will redirect you to the website anyways).
Once the account is created, you need to add the device to it - if that device is already associated with another account, it will consider that as the owner account and this new account as a “user” account. What this means in practice is that once you have added the device to the user account, it will trigger an approval that you can only submit from the owner account.
Once this is done, you can set up the Heat Pump via the aioaquarea integration using your user account whilst the comfort cloud integration remains mapped with your owner account. This is to prevent the two integrations clashing and logging you out from your account.