Choose an appropriate authentication method
You should choose an authentication method that is appropriate for the task you want to accomplish.
- To use the API for personal use, you can create a personal access token.
- To use the API on behalf of an organization or another user, you should create a GitHub App.
- To use the API in a GitHub Actions workflow, you should authenticate with the built-in
GITHUB_TOKEN.
For more information, see About authentication to GitHub.
Limit the permissions of your credentials
When creating a personal access token, only select the minimum permissions or scopes needed, and set an expiration date for the minimum amount of time you'll need to use the token. GitHub recommends that you use fine-grained personal access tokens instead of personal access tokens (classic). For more information, see Managing your personal access tokens.
A token has the same capabilities to access resources and perform actions on those resources that the owner of the token has, and is further limited by any scopes or permissions granted to the token. A token cannot grant additional access capabilities to a user.
When creating a GitHub App, select the minimum permissions that your GitHub App will need. For more information, see Best practices for creating a GitHub App.
When authenticating with GITHUB_TOKEN in a GitHub Actions workflow, only give the minimum amount of permissions needed. For more information, see Automatic token authentication.
Store your authentication credentials securely
Treat authentication credentials the same way you would treat your passwords or other sensitive credentials.
- Don't share authentication credentials using an unencrypted messaging or email system.
- Don't pass your personal access token as plain text in the command line. For more information, see Managing your personal access tokens.
- Don't push unencrypted authentication credentials like tokens or keys to any repository, even if the repository is private. Instead consider using a GitHub Actions secret. For more information, see Using secrets in GitHub Actions.
- You can use secret scanning to discover tokens, private keys, and other secrets that were pushed to a repository, or to block future pushes that contain secrets. For more information, see About secret scanning.
Limit who can access your authentication credentials
Don't share your personal access token with others. Instead of sharing a personal access token, consider creating a GitHub App. For more information, see About creating GitHub Apps.
If you need to share credentials with a team, store the credentials in a secure shared system. For example, you could store and share passwords securely using 1Password, or you could store keys in Azure KeyVault and manage access with your IAM (Identity and access management).
If you're creating a GitHub Actions workflow that needs to access the API, you can store your credentials in an encrypted secret, and access the encrypted secret from the workflow. For more information, see Using secrets in GitHub Actions and Making authenticated API requests with a GitHub App in a GitHub Actions workflow.
Use authentication credentials securely in your code
Never hardcode authentication credentials like tokens, keys, or app-related secrets into your code. Instead, consider using a secret manager such as Azure Key Vault or HashiCorp Vault. For more information about securing GitHub App credentials, see Best practices for creating a GitHub App.
When using a personal access token in a script, consider storing your token as a GitHub Actions secret and running your script through GitHub Actions. For more information, see Using secrets in GitHub Actions.
If none of these options are possible, you can store authentication credentials in a .env file. Make sure to encrypt your .env file, and never push it to any repository.
Prepare a remediation plan
You should create a plan to handle any security breaches in a timely manner. In the event that your token or other authentication credential is leaked, you will need to:
- Generate a new credential.
- Replace the old credential with the new one everywhere that you are storing or accessing the credential.
- Delete the old compromised credential.
For information about rotating compromised credentials for a GitHub App, see Best practices for creating a GitHub App.
For information about creating and deleting personal access tokens, see Managing your personal access tokens.