lib/Tumblr/API/RequestHandler.php
public function setConsumer($key, $secret)
    {
        $this->consumer = new \Eher\OAuth\Consumer($key, $secret);
    }
public function setConsumer($key, $secret)
    {
        $this->consumer = new \Eher\OAuth\Consumer($key, $secret);
    }
Set the consumer for this request handler

@param string $key    the consumer key
@param string $secret the consumer secret