Returning the internal server so it can be used outside

My use case is that we have legacy auth that will be checked first then if that fails we will use the OAuth server.
So then I can't really use the HandleTokenVerify, so want to be able to use the `gserver.ValidationBearerToken` directly

server.go

@@ -13,11 +13,12 @@ var (
 )
 
 // InitServer Initialize the service
-func InitServer(manager oauth2.Manager) {
+func InitServer(manager oauth2.Manager) *server.Server {
 	if err := manager.CheckInterface(); err != nil {
 		panic(err)
 	}
 	gServer = server.NewDefaultServer(manager)
+	return gServer
 }
 
 // HandleAuthorizeRequest the authorization request handling