Help finding the Control Panel/Adding Users

Help finding the Control Panel/Adding Users

I'm having such a hard time. I have a free Zoho mail account. I am logged in as the Super admin. I have user accounts that I want to add. Currently, all the the email accounts are separated and I just want everyone connected. Every resource says you can change/add people in the Control panel. I have scoured to find this control panel. I even tried links in past posts to reach it and they didnt work. Any help would be greatly appreciated.