I'm encountering challenges when using the InvokeHTTP processor in Apache NiFi to send GraphQL POST requests. Specifically, I'm trying to execute GraphQL mutations via POST but facing difficulties in configuring the InvokeHTTP processor to handle these requests properly. Problem: I've set up an InvokeHTTP processor to send GraphQL mutation requests via POST to a specific endpoint. However, the requests don't seem to be reaching the GraphQL server as expected.   Details: The InvokeHTTP processor is configured with the following properties: HTTP Method: POST Remote URL: myURL...! Headers: Content-Type: application/json, Accept: application/json Send Parameters in: Body The body content is constructed in JSON format as required by the GraphQL server. It includes the mutation query and variables.   Request for Help: I'm seeking guidance on how to properly configure the InvokeHTTP processor in NiFi to successfully send GraphQL POST requests. If anyone has experience using InvokeHTTP for GraphQL mutations or suggestions for troubleshooting this issue, I would greatly appreciate your insights.                   QUERY: { "query": "mutation AddUser($input: [AddUserInput!]!, $upsert: Boolean) { addUser(input: $input, upsert: $upsert) { user { name } } }", "variables": { "input": [ { "name": "Ali", "username": "Ali", "phone1": "111222333", "address": "LAHORE" } ], "upsert": false } } ... View more