I am new to grails and i am trying to add facebook plugin to my web application. i have successfully(as i believe) installed plugins and addED necessary code in my application. I followed the documentation found at http://splix.github.io/grails-spring-security-facebook/ , when I run my app I see the facebook connect button on gsp page,after clicking on connect button a popup opens up asking for permissions required in app and when user clicks on allow button i receive error "No authentication provider found". I dont know where i am wrong ,can any one help me please.  Thanks in advance