Method doExecute

/**
 * Internal function to execute the command.
 *
 * @param   InputInterface   $input   The input to inject into the command.
 * @param   OutputInterface  $output  The output to inject into the command.
 *
 * @return  integer  The command exit code
 *
 * @since   4.0.0
 */
protected function doExecute(InputInterface $input, OutputInterface $output) : int
{
    $this->configureIO($input, $output);
    $this->username = $this->getStringFromOption('username', 'Please enter a username');
    $this->ioStyle->title('Change password');
    $userId = UserHelper::getUserId($this->username);
    if (empty($userId)) {
        $this->ioStyle->error("The user " . $this->username . " does not exist!");
        return Command::FAILURE;
    }
    $user = User::getInstance($userId);
    $this->password = $this->getStringFromOption('password', 'Please enter a new password');
    $user->password = UserHelper::hashPassword($this->password);
    if (!$user->save(true)) {
        $this->ioStyle->error($user->getError());
        return Command::FAILURE;
    }
    $this->ioStyle->success("Password changed!");
    return Command::SUCCESS;
}