would like to upgrade to MailLite

would like to upgrade to MailLite

I have two email accounts for my domain, which I woulld like to upgrade to MailLite. I have an error showing as below when upgrading:

"Please purchase at least 3 user licenses to match active users in your organisation."

President and enquiries are the two accounts I would like to use, Please make president as superadmin.
So I can purchase 2 email accounts....
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