Lesson 4 - githubmodels-assignment.ipynb file has wrong token in example

[NileshMitra]

Describe the bug
The github token should not be there as there is no provider called github in the environment file

To Reproduce
Steps to reproduce the behavior:

1. Run the Validate Github Models Key Setup example

Expected behavior
It should sent back a proper response.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
It is throwing the error because there is no github token in environment

[github-actions]

👋 Thanks for contributing @NileshMitra! We will review the issue and get back to you soon.

[Sriram3341]

Jm.