code: protected String getCssClass(final String name) {
          var computedCssClass = "fa fa-lock";
          if (StringUtils.isNotBlank(name)) {
              computedCssClass = computedCssClass.concat(' ' + PAC4J_CLIENT_CSS_CLASS_SUBSTITUTION_PATTERN.matcher(name).replaceAll("-"));
          }
          LOGGER.debug("CSS class for [{}] is [{}]", name, computedCssClass);
          return computedCssClass;
      }
docs: Get a valid CSS class for the given provider name.
  
  @param name Name of the provider
  @return the css class