I have a following RESTful webservice, I have two methods for http get. One function signs in and other function signs out a user from an application. Following is the code:

import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.PathParam;
import javax.ws.rs.Consumes;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;

/**
 * REST Web Service
 *
 * @author Pointer
 */
@Path("generic")
public class GenericResource {

    @Context
    private UriInfo context;

    /**
     * Creates a new instance of GenericResource
     */
    public GenericResource() {
    }

    /**
     * Retrieves representation of an instance of
     * com.ef.apps.xmpp.ws.GenericResource
     *
     * @return an instance of java.lang.String
     */
    @GET
    @Produces("text/html")
    public String SignIn(@QueryParam("username") String username, @QueryParam("password") String password, @QueryParam("extension") String extension) {

        //TODO return proper representation object
        return "Credentials  " + username + " : " + password + " : " + extension;
    }

    @GET
    @Produces("text/html")
    public String SignOut(@QueryParam("username") String username, @QueryParam("password") String password, @QueryParam("extension") String extension) {

        //TODO return proper representation object
        return "Credentials  " + username + " : " + password + " : " + extension;
    }
}

Now, where would I specify that which function I want to call for http get?