Client Context

Issue in ./help/tutorial-comprehensive-technical-v21/modules/module8/ex1.md
In the first section where the first code snippet for python.
There is current context that needs to be defined: `client_context = PLATFORM_SDK_CLIENT_CONTEXT`.
Now this causes issue because is does not say where or how to define it.
Better if the code snippet was: `client_context = get_platform_sdk_client_context()`

Open help/tutorial-comprehensive-technical-v21/modules/module8/ex1.md and find the first section's first Python code snippet. Check how the client context is currently referenced and update the snippet so its definition is explicit. Done means the example uses get_platform_sdk_client_context() instead of the undefined PLATFORM_SDK_CLIENT_CONTEXT reference.

Written by the indexing model from the issue text.