how to create my new URL?

Hi, my current call to API Yahoo PlaceFinder is this:

http://where.yahooapis.com/geocode?q=barcelona, spain&appid=aaaaaa01&locale=en_US or http://where.yahooapis.com/geocode?q=-23.509455,-46.637821&appid=aaaaaa01&gflags=R

but, I now got this info: "Consumer Key" and "Consumer Secret"

I tried this but it did not work:

http://yboss.yahooapis.com/geo/placefinder?q=barcelona, spain&appid=aaaaaa02&locale=en_US&consumerKey=xxxx&consumerSecret=yyyy

with before request I get this response:

Please provide valid credentials. OAuth oauth_problem="unable_to_determine_oauth_type", realm="yahooapis.com"

how to create my new URL? Thanks.