Go to the Manage My Teams page (Settings >> Teams):
Simply enter the email of your team member >> select the role >> and click “Send Invite”. Your team member will receive an email invite and he simply needs to click the link inside the email to access your Zaxaa account in accordance with the permissions you grant him/her to.
As the owner of the account, you can edit the permission any time by clicking "Edit" icon".
Also read how your teammates can access your account here: How to access account as a team member.
Note: This feature is only available to Premium and Ultimate users.