In order to connect your Instagram to GRIN you will need to have an Instagram creator or business account. It is also required that your Instagram account be connected to a Facebook business page and not a regular profile. This guide will take you through how to create a Facebook page.
Once you have created your Facebook business page you will also need to connect your Instagram creator/business account to that page. Click here to learn how to do so.
Step 1 Click on the plus icon in the upper right-hand corner.
Step 2 Click on Pages.
Step 3 Enter a Page name, select a Category, and enter a Description for your page.
Step 4 Click on Create Page.