Creating a GetAllCustomers activity function 

Perform the following steps:

1. Create a new function named GetAllCustomers using the Durable Functions Activity template, replace the default code with the following code, and then click on the Save button to save the changes:

        #r "Microsoft.Azure.WebJobs.Extensions.DurableTask"
        public static int[] Run(string name)
        {
           int[] customers = new int[]{1,2,3,4,5};
           return customers;
        }

2. In the Advanced editor of the Integrate tab, replace the default code with the following code:

        {
           "bindings": [
           {
              "name": "name",
              "type": "activityTrigger",
              "direction": "in"
           }
           ]
        }