rest - Not able to access resource using access token using codeigniter-oauth2-server -

i'm using following project rest api authentication in codeigniter:

i'm able token. however, i'm not able access resource using token.

when i'm trying access resource, returns me empty array.

the route correct way.

i figure out because of line oauth2/resoource.php:

$this->server->require_scope("userinfo cloud file node");

if comment out line, i'm getting response:

{"success":true,"message":"you accessed apis!"}

but in case, doesn't validate access token. remove access token or send invalid access token, still gives me same response.

RT