Users are the lifeblood of any Slack workspace.
Obviously, without any users, theres no one to post or read any messages.
To be able to add people to your workspace you should probably invite them.
This means that each user needs to be specifically invited by someone to be able to join the workspace.
Thankfully, Slack offers an alternative method that allows you to add domain names to an allow list.
To get there, you first need to choose the workspace name in the top-right corner.
In the default controls tab, hit the Expand button for the Joining this workspace controls.
Click Expand next to Joining this workspace in the default options tab.
For example, youd enter the domain technipages.com to allow all Technipages email addresses to join.
Click Save at the bottom-left to apply the change.
Tip: To add multiple domains to the allow list, separate them with commas.