Demonstrates the use of the $item(index) method

This workflow demonstrates the use of the $item(index) method. This method is useful when you want to reference an item at a particular index. This example workflow makes POST HTTP requests to a dummy URL. Set node: This node is used to set the API key that will be used in the workflow later. This node returns a single item. This node can be replaced with other nodes, based on the use case. Customer Datastore node: This node returns the data of customers that will be sent in the body of the HTTP request. This node returns 5 items. This node can be replaced with other nodes, based on the use case. HTTP Request node: This node uses the information from both the Set node and the Customer Datast

Help me set up the n8n workflow "Demonstrates the use of the $item(index) method" (https://n8n.io/workflows/1330). It uses: HTTP Request, Customer Datastore (n8n training). Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.