If you are using MyController 0.0.3-alpha1 version,
Note: First you have to STOP(mycontroller/bin/stop.sh) MyController server
Download and extract http://www.h2database.com/h2-2014-04-05.zip in to your raspberry PI.
java -cp h2/bin/h2*.jar org.h2.tools.Shell
Set your path exactly with the above command.
you will get sql> execute select * from user; will display your password.