review comments

Author: Shamkh

articles/communication-services/quickstarts/advanced-messaging/whatsapp/includes/common-setting-python.md

@@ -15,9 +15,104 @@ zone_pivot_groups: acs-js-csharp-java-python
 
 ### Authenticate the client 
 
-The Messages SDK uses the `NotificationMessagesClient` to send messages. The `NotificationMessagesClient` method authenticates using your connection string acquired from Azure Communication Services resource in the Azure portal. For more information about connection strings, see [access-your-connection-strings-and-service-endpoints](../../../create-communication-resource.md#access-your-connection-strings-and-service-endpoints).
+Messages sending is done using NotificationMessagesClient. NotificationMessagesClient is authenticated using your connection string acquired from Azure Communication Services resource in the Azure portal. For more information on connection strings, see [access-your-connection-strings-and-service-endpoints](../../../../create-communication-resource.md#access-your-connection-strings-and-service-endpoints).
 
-[!INCLUDE [Authenticate the client ](./authenticate-notification-messages-client-net.md)]
+#### [Connection String](#tab/connection-string)
+
+Get Azure Communication Resource connection string from Azure portal as given in screenshot. On the left, navigate to the `Keys` tab. Copy the `Connection string` field for the primary key. The connection string is in the format `endpoint=https://{your Azure Communication Services resource name}.communication.azure.com/;accesskey={secret key}`.
+
+:::image type="content" source="../../media/get-started/get-communication-resource-connection-string.png" alt-text="Screenshot that shows an Azure Communication Services resource in the Azure portal, viewing the 'Primary Key' field in the 'Keys' section.":::
+
+Set the environment variable `COMMUNICATION_SERVICES_CONNECTION_STRING` to the value of your connection string.   
+Open a console window and enter the following command:
+```console
+setx COMMUNICATION_SERVICES_CONNECTION_STRING "<your connection string>"
+```
+After you add the environment variable, you might need to restart any running programs that will need to read the environment variable, including the console window. For example, if you're using Visual Studio as your editor, restart Visual Studio before running the example.
+
+For more information on how to set an environment variable for your system, follow the steps at [Store your connection string in an environment variable](../../../../create-communication-resource.md#store-your-connection-string-in-an-environment-variable).
+
+```python
+    # Get a connection string to our Azure Communication Services resource.
+    connection_string = os.getenv("COMMUNICATION_SERVICES_CONNECTION_STRING")
+    
+    def send_template_message(self):
+        from azure.communication.messages import NotificationMessagesClient
+
+        # Create NotificationMessagesClient Client
+        messaging_client = NotificationMessagesClient.from_connection_string(self.connection_string)
+```
+
+#### [Microsoft Entra ID](#tab/aad)
+
+NotificationMessagesClient is also authenticated using Microsoft Entra ID/TokenCredentials. For more information, see [access-Azure-Communication-Resources-using-TokenCredentials](/python/api/overview/azure/identity-readme?view=azure-python&preserve-view=true#environment-variables).
+
+The [`azure.identity`](https://github.com/Azure/azure-sdk-for-python/tree/azure-identity_1.15.0/sdk/identity/azure-identity) package provides various credential types that your application can use to authenticate. You can choose from the various options to authenticate the identity client detailed at [Azure Identity - Credential providers](/python/api/overview/azure/identity-readme?view=azure-python#credential-classes&preserve-view=true) and [Azure Identity - Authenticate the client](/python/api/overview/azure/identity-readme?view=azure-python#authenticate-with-defaultazurecredential&preserve-view=true). This option walks through one way of using the [`DefaultAzureCredential`](/python/api/overview/azure/identity-readme?view=azure-python#defaultazurecredential&preserve-view=true).
+ 
+The `DefaultAzureCredential` attempts to authenticate via [`several mechanisms`](/python/api/overview/azure/identity-readme?view=azure-python#defaultazurecredential&preserve-view=true) and it might be able to find its authentication credentials if you're signed into Visual Studio or Azure CLI. However, this option walks you through setting up with environment variables.   
+
+To create a `DefaultAzureCredential` object:
+1. To set up your service principle app, follow the instructions at [Creating a Microsoft Entra registered Application](../../../../identity/service-principal.md?pivots=platform-azcli#creating-a-microsoft-entra-registered-application).
+
+1. Set the environment variables `AZURE_CLIENT_ID`, `AZURE_CLIENT_SECRET`, and `AZURE_TENANT_ID` using the output of your app's creation.    
+    Open a console window and enter the following commands:
+    ```console
+    setx COMMUNICATION_SERVICES_ENDPOINT_STRING "<https://<resource name>.communication.azure.com>"
+    setx AZURE_CLIENT_ID "<your app's appId>"
+    setx AZURE_CLIENT_SECRET "<your app's password>"
+    setx AZURE_TENANT_ID "<your app's tenant>"
+    ```
+    After you add the environment variables, you might need to restart any running programs that will need to read the environment variables, including the console window. For example, if you're using Visual Studio as your editor, restart Visual Studio before running the example.
+
+1. To use the [`DefaultAzureCredential`](/python/api/overview/azure/identity-readme?view=azure-python#defaultazurecredential&preserve-view=true) provider, or other credential providers provided with the Azure SDK, install the `azure.identity` python package and then instantiate client.
+    
+```python
+    # Get a connection string to our Azure Communication Services resource.
+    endpoint_string = os.getenv("COMMUNICATION_SERVICES_ENDPOINT_STRING")
+    
+    def send_template_message(self):
+        from azure.communication.messages import NotificationMessagesClient
+        from azure.identity import DefaultAzureCredential
+
+        # Create NotificationMessagesClient Client
+        messaging_client = NotificationMessagesClient(endpoint=self.endpoint_string,
+                                                    credential=DefaultAzureCredential())
+```
+
+#### [AzureKeyCredential](#tab/azurekeycredential)
+
+You can also authenticate with an AzureKeyCredential.
+
+Get the endpoint and key from your Azure Communication Services resource in the Azure portal. On the left, navigate to the `Keys` tab. Copy the `Endpoint` and the `Key` field for the primary key.
+
+:::image type="content" source="../../media/get-started/get-communication-resource-endpoint-and-key.png" lightbox="../../media/get-started/get-communication-resource-endpoint-and-key.png" alt-text="Screenshot that shows an Azure Communication Services resource in the Azure portal, viewing the 'Connection string' field in the 'Primary key' section.":::
+
+Set the environment variable `COMMUNICATION_SERVICES_KEY` to the value of your connection string.   
+Open a console window and enter the following command:
+```console
+setx COMMUNICATION_SERVICES_ENDPOINT_STRING "<https://<resource name>.communication.azure.com>"
+setx COMMUNICATION_SERVICES_KEY "<your key>"
+```
+After you add the environment variable, you might need to restart any running programs that will need to read the environment variable, including the console window. For example, if you're using Visual Studio as your editor, restart Visual Studio before running the example.
+
+For more information on how to set an environment variable for your system, follow the steps at [Store your connection string in an environment variable](../../../../create-communication-resource.md#store-your-connection-string-in-an-environment-variable).
+
+To instantiate a `NotificationMessagesClient`, add the following code:
+
+```python
+    # Get a connection string to our Azure Communication Services resource.
+    endpoint_string = os.getenv("COMMUNICATION_SERVICES_ENDPOINT_STRING")
+    key = os.getenv("COMMUNICATION_SERVICES_KEY")
+
+    def send_template_message(self):
+        from azure.core.credentials import AzureKeyCredential
+        from azure.communication.messages import NotificationMessagesClient
+
+        # Create NotificationMessagesClient Client
+        messaging_client = NotificationMessagesClient(endpoint=self.endpoint_string,
+                                                    credential=AzureKeyCredential(self.key))
+```
+---
 
 ### Set channel registration ID