Update tutorial steps to include Azure CLI authentication for post-deployment script

Author: ggailey777

articles/azure-functions/durable/tutorial-durable-text-analysis-azure-files.md

@@ -60,10 +60,11 @@ The sample code for this tutorial is in the [Azure Functions Flex Consumption wi
 
 This sample is an [Azure Developer CLI (azd)](/azure/developer/azure-developer-cli/overview) template. A single `azd up` command provisions infrastructure, deploys the function code, and uploads sample text files to the Azure Files share.
 
-1. Sign in to Azure:
+1. Sign in to Azure. The post-deployment script uses Azure CLI commands, so you need to authenticate with both tools:
 
     ```bash
     azd auth login
+    az login
     ```
 
 1. Provision and deploy everything:

articles/azure-functions/tutorial-ffmpeg-processing-azure-files.md

@@ -85,10 +85,11 @@ The function reads the mount path from an environment variable (`FFMPEG_PATH`) t
 
 This sample is an [Azure Developer CLI (azd)](/azure/developer/azure-developer-cli/overview) template. A single `azd up` command provisions infrastructure, deploys the function code, uploads the ffmpeg binary to Azure Files, and creates the EventGrid subscription for blob triggers.
 
-1. Sign in to Azure:
+1. Sign in to Azure. The post-deployment script uses Azure CLI commands, so you need to authenticate with both tools:
 
     ```bash
     azd auth login
+    az login
     ```
 
 1. Provision and deploy everything: