sudo apt-get install apt-transport-https
wget -O - https://manage.intouchfollowup.com/intouch_repo_gpg_key.pub | sudo apt-key add -

Dev Branch :
deb [arch=all] https://USER:PWD@manage.intouchfollowup.com/repo/dev jessie dev

QA Branch :
deb [arch=all] https://USER:PWD@manage.intouchfollowup.com/repo/qa jessie qa

Staging Branch :
deb [arch=all] https://USER:PWD@manage.intouchfollowup.com/repo/staging jessie staging

Production Branch :
deb [arch=all] https://USER:PWD@manage.intouchfollowup.com/repo/ jessie main