How do I set another accounts as a group mask admin ?

[Former user]

As title says, I'm looking for the way to set another account as my group mask admin. I was stupidly enough to create my group mask with the alt and logging into an alt account bothering me everysingle time I add mask access for new accounts. I didn't find option to transfer mask admin or set others an admin. Ho do I do that ?

[Astriania]

Issue #441 was marked as a duplicate of this issue.