GitHub Error: Authentication Failed from the Command Line

After setting up 2 Factor Authentication on GitHub, I couldn’t push my remote repositories from the command line anymore.

When I tried to push a remote repo, the command line threw this error:

~ :> git push origin my-branch
Username for 'https://github.com': myusernamePassword for 'https://myusername@github.com': mypasswordremote: Invalid username or password.fatal: Authentication failed for 'https://github.com/my-repository

The error stumped me — and made me vow that, when I did ultimately get to the bottom of it, I’d do my best to pay the knowledge forward.

How to Authenticate on GitHub with 2FA

Command line authentication requires a personal access token.

Go to Settings:

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Then Developer Settings:

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Then Personal access tokens:

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Generate a new Personal Access Token. Make sure you copy the Personal Access Token as soon as it gets generated — you won’t be able to see it again!

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Paste the Personal Access Token into the “Password” field when you authenticate via the command line.

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GitHub has published official instructions for this flow here (though without glam screenshots…)

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