src/Composer/Util/Bitbucket.php
public function authorizeOAuth($originUrl)
    {
        if ($originUrl !== 'bitbucket.org') {
            return false;
        }

        // if available use token from git config
        if (0 === $this->process->execute('git config bitbucket.accesstoken', $output)) {
            $this->io->setAuthentication($originUrl, 'x-token-auth', trim($output));

            return true;
        }

        return false;
    }
public function authorizeOAuth($originUrl)
    {
        if ($originUrl !== 'bitbucket.org') {
            return false;
        }

        // if available use token from git config
        if (0 === $this->process->execute('git config bitbucket.accesstoken', $output)) {
            $this->io->setAuthentication($originUrl, 'x-token-auth', trim($output));

            return true;
        }

        return false;
    }
Attempts to authorize a Bitbucket domain via OAuth

@param  string $originUrl The host this Bitbucket instance is located at
@return bool   true on success