Neos\Neos\Command\UserCommandController::addRoleCommand PHP Method

    public function addRoleCommand($username, $role, $authenticationProvider = null)
    {
        $user = $this->getUserOrFail($username, $authenticationProvider);
        try {
            if ($this->userService->addRoleToUser($user, $role) > 0) {
                $this->outputLine('Added role "%s" to accounts of user "%s".', array($role, $username));
            } else {
                $this->outputLine('User "%s" already had the role "%s" assigned.', array($username, $role));
            }
        } catch (NoSuchRoleException $exception) {
            $this->outputLine('The role "%s" does not exist.', array($role));
            $this->quit(2);
        }
    }