setup-node/node_modules/@octokit/auth-token/dist-src/with-authorization-prefix.js

/**
 * Prefix token for usage in the Authorization header
 *
 * @param token OAuth token or JSON Web Token
 */
export function withAuthorizationPrefix(token) {
    if (token.split(/\./).length === 3) {
        return `bearer ${token}`;
    }
    return `token ${token}`;
}