Create, update, and get a document in Google Cloud Firestore

This example workflow allows you to create, update, and get a document in Google Cloud Firestore. The workflow uses the Set node to set the data, however, you might receive data from a different source. Add the node that receives the data before the Set node and set the values you want to insert in a document, in the Set node. Also, update the Columns/ attributes fields in the Google Cloud Firestore node.

Help me set up the n8n workflow "Create, update, and get a document in Google Cloud Firestore" (https://n8n.io/workflows/839). It uses: Google Cloud Firestore. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.