def _request(self, method, url, headers=None, params=None, **aio_kwargs):
        """Setup Authorization Header.."""
        access_token = params.pop(self.access_token_key, None)
        if access_token:
            headers['Authorization'] = "Bearer %s" % access_token
        return super(DiscordClient, self)._request(
            method, url, headers=headers, params=params, **aio_kwargs)
Setup Authorization Header..