In Domain of One's Own - Version 2, every cPanel account is owned by a specific user. There may, however, be times when another person legitimately needs some level of access to the cPanel account or some resources on it. When granting such access, you should operate with the principle of least privilege in mind, and only give someone the level of access they actually need; more permissions means more problems should the account be compromised. For example, maybe an FTP account limited to a specific directory or a user on an application hosted on the account will suffice instead of full access to the entire account. cPanel itself even offers a degree of greater access with their Manage Team functionality if more privileges are needed.
Collaboration
If the entire cPanel account itself does actually need to be shared with another user, then that is possible on Domain of One's Own - Version 2. In your DoOO WordPress Portal, navigate to the DoOO Accounts page (DoOO Dashboard >> DoOO Accounts). There you'll see the list of accounts. Open the dropdown menu of the account you wish to share with another user.
Then, in the field under Share With Another User, enter the WordPress User ID/Username/Email of the user with whom you wish to share the account (the Username or Email of a particular user can be retrieved from the WordPress Users page on /wp-admin/users.php), and hit the Share button. The user with whom the account has been shared will then show up in the above list. Removing shared access to an account is as easy as hitting the Unshare button next to the user from whom you wish to remove access.
Changing Ownership
If, instead of shared access, ownership needs to be fully given to another user, that can be done in a similar way to the sharing of an account. Just fill out the field under Change Account Owner with the WordPress User ID/Username/Email of the new owner and hit the Change button.