1 - GSuite Marketplace
To install the add-on, click the install button on Site Catalog’s GSuite Marketplace page.
2 - Granting permissions
After clicking this button, an authentication pop up will appear. Select the relevant account to install the add-on.
Once selected, you will be prompted to grant permissions to Sites Catalog. Please do so to complete the installation.
3 - Installation Successful
The People Directory add-on is now successfully installed in Google Sheets. You should be able to see Sites Catalog by Awesome Table under Add-ons.