Immediate Fix
The most effective way to resolve the “Git Authentication Failed” error in VS Code is to reset the Git credential helper. This forces the system to prompt you for new, valid credentials.
Open your terminal in VS Code and run the following command to configure the Git Credential Manager:
git config --global credential.helper managerNext, trigger a manual sign-in by attempting to pull from your repository:
git pull origin mainIf the pop-up appears, sign in via your browser or paste your Personal Access Token (PAT). Ensure that the “Git: Terminal Authentication” setting is enabled in your VS Code settings (Ctrl + ,).
Technical Explanation
Git authentication failures typically occur when the locally stored credentials no longer match the requirements of the remote server (e.g., GitHub, GitLab, or Bitbucket).
This happens most frequently when users enable Two-Factor Authentication (2FA) but continue to use their account password instead of a Personal Access Token. It can also occur when the OS-level credential store (Windows Credentials Manager or macOS Keychain) holds an expired token.
| Common Cause | Technical Reason |
|---|---|
| Expired PAT | Tokens have a set lifespan and must be rotated for security. |
| 2FA Enforcement | Standard passwords are rejected when 2FA is active on the remote. |
| Helper Mismatch | The local Git config is pointing to a credential helper that isn’t installed. |
Alternative Methods
Method 1: Clearing Stored Credentials
If the automated helper fails, you may need to manually remove the old credentials from your operating system. This clears the cache and forces a fresh handshake.
On Windows, search for “Credential Manager” in the Start menu, go to “Windows Credentials,” and remove any entries related to your Git provider. On macOS, use “Keychain Access” and search for “git”.
Method 2: Switching to SSH
Using SSH keys instead of HTTPS eliminates the need for passwords and tokens entirely. This is the preferred method for many professional developers.
First, generate an SSH key if you haven’t already, then update your remote URL using the following command:
git remote set-url origin [email protected]:USERNAME/REPOSITORY.gitThis bypasses the HTTPS credential helper and uses your private key for seamless authentication.