When other people at your company sign up for PopSQL with the same email domain (ie @yourcompany.com), they'll automatically be added to your organization in PopSQL.
To send invitations to your teammates via email, click on your name in the top right and click Invite People.
To create an invitation link that you can drop in a Slack channel, click on your name on the top right, click Invite People, and click Copy invitation link. This will generate a link like popsql.com/invitations/123456, and when people click it, they'll be prompted to join your organization.
See who's in your organization
To see who's in your organization, check out Preferences > Your Company > Users.