resource uri

Hi, Thanks for the great plugin!. Setup was a breeze and I was able to get a valid token but how do I add custom resource uri to the plugin. I tried using add_filter(‘wo_endpoints’,’myendpoint’) but this says end point “{“error”:”invalid_request”,”error_description”:”Unknown request”}”. Any idea what am I missing?. Also I could not find the developer documentation. Any help would be appreciated. Thanks.

https://ww.wp.xz.cn/plugins/oauth2-provider/