Okay here is the situation, I bought a hosting server that gives me version control and ssh access. I'm working on a big project that needs team work so I need at least 10 person around the globe to work on the project,.
this is the structure of the project:
3 of those 10 person work on site1, other 3 on site2, and other 4 work on site3. And the first 3 person who work on site1 should NOT be able to access to site2 and site3 and so on.
I have only one username on my server which is the one my hosting gave me which i have to give it to my team workers.