Thanks for your help, altough your answer is wrong because there are no a blocking method with that signature (you're taking an async one), i've figured out to solve my problem using:
Take a look at the `User` class javadocs-- it shows a master list of all available methods. http://devcenter.kinvey.com/android/reference/api/java/reference/com/kinvey/java/User.html#
You probably want the retrieveBlocking method, with an empty query--
camiloramirezqf