If you are an organization admin and you want to invite someone to have to same access as you, here is how.
First, you will have to be an organization admin If you are unsure of whether you are or not, you can check by going to the organization page by clicking the person icon at the top right, and selecting organization. If you do not see this, it is likely you aren't an organization admin, and I would recommend reaching out to support@nicheacademy.com so we can check who is and they can send you an invite.
Once you click into the organization, you will be greeted with the organization page, and then you can click into the "System Admins" section on the right-hand side.
Once in the System Admins screen, you can click the "+" Icon at the top right, which will then open an Invite admins screen where you can put the email of the user you want to invite, then you can click "invite" to send them the invitation. 
If you ran into any issues along the way, feel free to reach out to support@nicheacademy.com for help.