IdentityServer: requesting resource scopes in ImplicitFlow

If I'm using client with implicit flow is it possible to request resource scopes along with identity scopes?

I tried creating OpenIdConnectAuthenticationOptions as below:

new OpenIdConnectAuthenticationOptions
{
  ClientId = "implicitclient",
  Authority = ...,
  RedirectUri = ...,
  ResponseType = "id_token token",
  Scope = "identity_scope resource_scope",
  ...

Still when authenticated getting back only identity_scope.

Any help and comments appreciated.

via Chebli Mohamed