Please follow the linked video tutorial
to install Plastic SCM for your group collaboration.
https://youtu.be/erb_Rk9-vwA?si=eRcPBTGvAjpdCYwU
How to Add Collaborator (after installing Plastic SCM)
https://youtu.be/AKU7Y-xkmTw?si=zxGA4IT0JgxaETgx
Plastic: full branching stack