If you’re an admin, you can invite members using an invite link.
To create it:
Go to the OSlash dashboard (o/+enter)
Click on Invite members at the bottom left of the screen
Go to the Invite by link tab
Select whether you want to create an invite link to invite users as members or admin
Choose whether to allow anyone to join the workspace using the invite link or restrict users with email addresses from a specific domain. If you want to ensure the latter, then specify the domain
Click on Create link
You can copy the generated link and send it to the members you wish to invite to the workspace.