The admin left the team. How do we appoint a new admin?

The person who had the admin role of the team left and she did’nt appoint new admin before. How do we do to appoint a new admin ? Thank you!

Would humbly suggest asking any of the long term users if they wish to take on the job. And in you get only 2 or 3 people saying ‘Yes’ and are qualified, make them co-admins. This way the issue of one admin leaving is not such a cliff hanger. Going forward try and maintain 2 or 3 admins.