Navigate to Settings > Admin > Team
Click on Invite User
Enter the:
Users email address
The role for the user. Read about roles and permissions here.
The new user will appear at the top of the page under ‘Pending Invites’ and they will receive an invitation to join your organization.
If they don’t receive an email, you can resend the invitation by clicking the 3 dots of their pending invitation and selecting ‘Resend’.
You can revoke their invitation by clicking the 3 dots of their pending invitation and selecting ‘Revoke’.