Complete example to send a notification

[nMustaki]

Description

One Line Summary

REQUIRED - Very short description that summaries the changes in this PR.

A complete getting started example to send a notification

Details

Motivation

REQUIRED - Why is this code change being made? Or what is the goal of this PR? Examples: Fixes a specific bug, provides additional logging to debug future issues, feature to allow X.

I wanted to try the Python package, but it was hard to get started since I had to dwell into the raw API documentation to understand what models to use.
So here is a complete example to get people started.

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
  • If it is hard to explain how any codes changes are related to each other then it most likely needs to be more than one PR
• Any Public API changes are explained in the PR details and conform to existing APIs

Testing

• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
  • Simplify with less code, followed by splitting up code into well named functions and variables, followed by adding comments to the code.
• I have reviewed this PR myself, ensuring it meets each checklist item
  • WIP (Work In Progress) is ok, but explain what is still in progress and what you would like feedback on. Start the PR title with "WIP" to indicate this.