Stuck as ROOT in the Terminal



i started using c9 for cs50 psets, i ran the sudo -s command in an attempt to install meteor for my final project. but now i cant login as a user from the terminal. even my preview link has changed, my username is no longer there. is there a way i can restart the IDE?

here lies an img

Super user (root) in terminal

the default username is ubuntu, so you can do sudo - su ubuntu, but if you have used sudo - su root it is better to just run exit, to get back to the previous shell.
You can also just close the terminal and open a new one