The purpose of this exercise is not to give a "gotcha" question or puzzle, but a straight-forward (albeit contrived) example of the kind of requirement that might arise in a real project so that we have shared context for a technical conversation during the interview. We are interested in how you approach a project. Use of your favorite libraries or frameworks is fine, but not required. How you demonstrate the correctness of your implementation is up to you.

Create a command line Python program, which retrieves the information of a GitHub User and creates a new Contact or updates an existing contact in Freshdesk, using their respective APIs.

• Use GitHub Rest API v3. Documentation is available at https://developer.github.com/v3/
• Use Freshdesk API v2. Documentation is available at https://developers.freshdesk.com/api/
• Your program should be able to get GitHub user login (username) and Freshdesk subdomain from the command line.
• For authentication assume GitHub personal access token is given in GITHUB_TOKEN environmental variable and Freshdesk API key is given in FRESHDESK_TOKEN environmental variable.
• Transfer all compatible fields from the GitHub User to the Freshdesk Contact by your judgment
• Please provide unit tests for the main program functionality. Create a separate module for the unit tests.
• You need to use Python 3.x.
• You may also use any Python libraries which will help you with the task, such as requests or mock, except for API clients for Freshdesk or GitHub.
• Please provide a README.md file with instructions on how to run the Python program and the tests.