Bitbucket
Bitbucket is where we're hosting all our code (including this wiki). Bitbucket behaves like any other Git repository. You can access it from the terminal as long as you have Git installed.
The company behind Bitbucket (Atlassian) also has their own free Git desktop client called SourceTree. If you prefer a GUI for your Git interactions, SourceTree is a good option.
Users
Every user should have their own Bitbucket account. Once accounts have been created, they can be assigned into groups on the groups page of Bitbucket:
https://bitbucket.org/account/user/bridgeschool/groups/
In most cases, you will just need to assign the user to the Developers group to allow them write access to the repositories. If for some reason you need to grant a user read-only access to the repositories, you can assign them to the Viewers group.
Users can also be assigned to specific repositories from the settings page for that repository. In most cases though, groups are sufficient and a better way to manage access.