login.compnay_login_form:
  path: '/u/{company_name}/login'
  defaults:
    _controller: 'DrupalloginControllerLoginController::login_form'
    _title: 'Login'
  requirements:
    _permission: 'access content

login.compnay_login_form:
  path: '/{company_name}/login'
  defaults:
    _controller: 'DrupalloginControllerLoginController::login_form'
    _title: 'Login'
  requirements:
    _permission: 'access content'

/**
 * Implements hook__path_insert().
 */
function mymodule_path_insert($path) {
  if (preg_match('/company/(.*)/', '/company/xyz', $matches) && preg_match('/node/(d+)$/', $path['source'])) {
  $company_name = $matches[1];
    Drupal::service('path.alias_storage')->save("/u/$company_name/login", "$company_name/login" $path['langcode']);
  }
}