Get requests is stuck

Hi. I tried to get userinfo by access token from /userinfo endpoint. But request via this library is stuck. This  request via postman works normally. My source code:

```
    def get_userinfo_by_access_token(self, access_token):
        response = RestliClient().get(
            resource_path="/userinfo",
            access_token=access_token
        )

        return response.entity
```