How can i have multiple people working on the same project at once?

First off, sorry if i’m posting this in the wrong section.

I have 4 people wanting to work on a game but i have no idea how i would go about connecting 4 different unreal engine accounts to 1 project.

Is it possible to have a live project that 4 people can work on at once or anyway we can share files?

Thank you for you help.

I recommend Perforce

^ This.

You also have the choice of Git, SVN and others, but to me, the Perforce integration into UE4 is the most solid.

Git by itself is good for source, but it requires the use of Git LFS (Large File Storage) for other assets.
A lot of people seem to have issues with Git LFS.
I haven’t tried it (LFS) myself, so cannot comment further.