As an admin user, you can promote and demote users access privileges
Firstly, select 'manage users' from the bar at the top of your home page.
From here, you will be taken to a page that will show you all of the active users you have within your account.
Next to your users name and email, you will see the following options.
1) Role - this will either state 'standard' or 'admin'
2) Promote - this will state either 'demote' or 'promote' dependant on the users current access privileges.
3) Remove - this can be used if you would like to remove a users access from your account
From here, you can edit your users permission.
Please note - this access is only available to existing admin users, please contact one of your internal admins if you require further assistance with this.