When using the Airtable connector for the first time, you need to create a new authentication.

Name your authentication and specify the type ('Personal' or 'Organizational').

The next step is to select your service permissions.

Once done, click Create authentication.

In the dialog box, select the base or a workspace to which you want to grant access for

You can select multiple base/ workspace. Once done click the Grant access button.

Go back to your settings authentication field (within the workflow builder properties panel), and select the recently added authentication from the available dropdown options . Your connector authentication setup for Slack's version 10 is now complete.