added quickstart repo link to the cte python

Author: AikoBB

articles/communication-services/quickstarts/includes/manage-teams-identity-python.md

@@ -15,7 +15,10 @@ ms.author: gistefan
 
 ## Set up prerequisites
 
-- [Python](https://www.python.org/downloads/) 2.7 or 3.6+.
+- [Python](https://www.python.org/downloads/) 3.7+.
+
+## Final code
+Find the finalized code for this quickstart on [GitHub](https://github.com/Azure-Samples/communication-services-python-quickstarts/tree/main/manage-teams-identity-mobile-and-desktop).
 
 ## Set up
 
@@ -32,13 +35,13 @@ ms.author: gistefan
    ```python
    import os
    from azure.communication.identity import CommunicationIdentityClient, CommunicationUserIdentifier
+   from msal.application import PublicClientApplication
 
    try:
       print("Azure Communication Services - Access Tokens Quickstart")
       # Quickstart code goes here
    except Exception as ex:
-      print("Exception:")
-      print(ex)
+      print(f"Exception: {ex}")
    ```
 
 ### Install the package
@@ -55,18 +58,21 @@ pip install msal
 The first step in the token exchange flow is getting a token for your Teams user by using [Microsoft.Identity.Client](../../../active-directory/develop/reference-v2-libraries.md). In Azure portal, configure the Redirect URI of your "Mobile and Desktop application" as `http://localhost`.
 
 ```python
-from msal.application import PublicClientApplication
-
-client_id = "<contoso_application_id>"
-tenant_id = "<contoso_tenant_id>"
+# This code demonstrates how to fetch your Azure AD client ID and tenant ID
+# from an environment variable.
+client_id = os.environ["AAD_CLIENT_ID"]
+tenant_id = os.environ["AAD_TENANT_ID"]
 authority = "https://login.microsoftonline.com/%s" % tenant_id
 
+# Create an instance of PublicClientApplication
 app = PublicClientApplication(client_id, authority=authority)
 
 scopes = [ 
 "https://auth.msft.communication.azure.com/Teams.ManageCalls",
 "https://auth.msft.communication.azure.com/Teams.ManageChats"
  ]
+
+# Retrieve the AAD token and object ID of a Teams user
 result = app.acquire_token_interactive(scopes)
 aad_token =  result["access_token"]
 user_object_id = result["id_token_claims"]["oid"] 
@@ -92,6 +98,7 @@ client = CommunicationIdentityClient.from_connection_string(connection_string)
 Use the `get_token_for_teams_user` method to issue an access token for the Teams user that can be used with the Azure Communication Services SDKs.
 
 ```python
+# Exchange the Azure AD access token of the Teams User for a Communication Identity access token
 token_result = client.get_token_for_teams_user(aad_token, client_id, user_object_id)
 print("Token: " + token_result.token)
 ```