If you have another person in your team to help you manage the profiles they can sign in free and you can grant them access to a specific model account.

To do so you need to switch to the model account and under the avatar menu click Account settings.

In that panel click “Permissions” and “+New” to link the manager account to model account.

Once the manager account is added they will be able to switch to the model account using their own credentials.

As a Master account you always keep control over the models account and can revoke the access to any manager. To do so you need to switch to the model account, go back into the permissions and simply delete the manager from the list.

I recommend never to grant access permission to your master account but you are free to draft your organigram.