To invite new members to your organization you need to be the organization's admin
Create a new team
Go to the settings page and click on teams
You will see all your teams
Click on a new team
Add team name and hit Add
In the chosen team click on invite users
Invite one or more users and chose their access level
After hitting Send invites, the user status will be set to pending until the activation of the account
Users will get an email to click on the join now and will get redirected to a page where they need to fill up their information and set up a password
For users with reading and write access levels your admin needs to update the allocated resources by updating the team quota
In Teams page
Choose the team you will update the quota
Choose the number of dashboards you want to allocate and hit save.
Admin can track the active dashboards of each team, and see the number of users.