Ruuter withCredentials error

[varmoh]

Currently, when using the Ruuter in modules, I get the following CORS
CORS policy: The value of the 'Access-Control-Allow-Credentials' header in the response is '' which must be 'true' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

To bypass it, I have to change /src/main/java/ee/buerokratt/ruuter/configuration/CORSConfiguration.java
and add the line .allowCredentials(true)

Is there another way to configure it outside java ?