I'm getting stuck trying to provide the "temporary url" for customers. Using PHP wrapper for cURL. There is a call for "get_temp_url" that requires a secret key that, according to the Rackspace documentation, "you must first set the metadata header X-Account-Meta-Temp-URL-Key on your Cloud Files account to a key that only you know." The get_temp_url executes flawlessly, but I don't know how I'm supposed to set the X-Account-Meta-Temp-URL-Key on my account. I don't see a PHP wrapper for this function, and I don't see where I can go through my control panel to set it.

I think I'm missing something here. Any help appreciated.