Zoom Android SDK error code 2

I am working on zoom android SDK. However, if I try to execute the program. 
It is showing me error code 2 and internal code 3023 
I have downloaded this code from github. I don’t understand what does this mean. Any help would be appreciated.

Hi Shahroze, 

please double check on your SDK key/secret pair, 3023 means invalid key or secret.