Platformsh\Cli\Command\CommandBase::login PHP Method

    public function login()
    {
        if (!$this->output || !self::$interactive) {
            throw new LoginRequiredException();
        }
        $exitCode = $this->runOtherCommand('login');
        $this->stdErr->writeln('');
        if ($exitCode) {
            throw new \Exception('Login failed');
        }
    }