I wrote an aritcle about  How To Use GitHub For Project Collaboration — Based on Agile Method.

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https://adiati.com/how-to-use-github-for-project-collaboration-based-on-agile-method

DEV:
https://dev.to/adiatiayu/how-to-use-github-for-project-collaboration-based-on-agile-method-kb7

CodeNewbie:
https://community.codenewbie.org/adiatiayu/how-to-use-github-for-project-collaboration-based-on-agile-method-3ep2