code: public void tokenEndpointAuthenticationFilters(List<Filter> filters) {
  		Assert.notNull(filters, "Custom authentication filter list must not be null");
  		this.tokenEndpointAuthenticationFilters = new ArrayList<Filter>(filters);
  	}
docs: Sets a new list of custom authentication filters for the TokenEndpoint. Filters will be set upstream of the
  default BasicAuthenticationFilter.
  
  @param filters The authentication filters to set.