I am able to use this command successfully to step through each git repo (subfolder) in my directory:
for i in */.git; do ( echo $i; cd $i/..; git pull; ); done
This displays the folder name, changes into the directory, runs git pull, and then prompts me to enter my username and password.
I would like to be able to auto type in the user/PW since I have a lot of repos in the directory.