You can add as many admin users to your account as you'd like@ To do so, login and click the gear icon (upper righthand side) and choose Account Settings. Under My Account, you can add a new email address. This can be another admin's email address or your own updated email address. This will send an email to the new email address for that user to confirm.
You may also indicate here if you'd like that email address to receive notifications.
If this user would like to receive failed payment notifications specifically, their email address can be added under Kitchen Settings > General > Payment Failed Notification. Enter a comma between each email address, if multiple.
Each user will login with their own email address. The password however is shared across the account. There can only be one password per Food Corridor account.