How to fix authentication failed git

GitDebug / FixBeginner · 4 min read

How to Fix Authentication Failed Error in Git

The authentication failed error in Git usually happens when your credentials are wrong or outdated. Fix it by updating your username and password or switching to SSH keys for authentication.

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Why This Happens

This error occurs when Git cannot verify your identity with the remote server. Common reasons include wrong username or password, expired tokens, or using HTTPS URLs without proper credentials.

bash

git clone https://github.com/username/repo.git
# When prompted, entering wrong password or token causes failure

Output

fatal: Authentication failed for 'https://github.com/username/repo.git/'

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The Fix

Update your saved credentials or switch to SSH authentication. For HTTPS, clear old credentials and enter the correct username and personal access token (PAT). For SSH, generate and add your SSH key to GitHub or your Git server.

bash

git credential-manager reject https://github.com
# Then try cloning again and enter correct credentials

# Or switch to SSH:
git clone git@github.com:username/repo.git

Output

Cloning into 'repo'... remote: Enumerating objects: 10, done. remote: Counting objects: 100% (10/10), done. remote: Compressing objects: 100% (8/8), done. Receiving objects: 100% (10/10), done.

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Prevention

Use SSH keys instead of HTTPS for smoother authentication. Regularly update your personal access tokens before they expire. Store credentials securely using Git credential helpers to avoid repeated prompts.

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Related Errors

Permission denied (publickey): Happens when SSH keys are missing or not added to your Git server.
Repository not found: Occurs if you use wrong URLs or lack access rights.

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Key Takeaways

Authentication failed means Git can't verify your identity with the remote server.

Update or clear saved credentials and use correct username and token for HTTPS.

Switch to SSH keys for easier and more secure authentication.

Use Git credential helpers to store credentials safely and avoid repeated prompts.

Regularly renew personal access tokens to prevent expiration issues.