Log out of your account
Go to the Login Screen
Select New user? Sign up a new account
Enter the details of the new person.(Please note each person must register a unique email address, you cannot use a generic email, personal email addresses are fine)
Log out again as them, then log back in as yourself.
Go to People/Staff, then ‘Add New User’.
Enter their email address as used above.
Select the appropriate role Staff / Admin.