User name of the Github account for the Git repo.
Note Since this is a project setting, it is saved in the project file, but the project file is uploaded to the Git repo, there is security concern. To protect your Github account, the Git repo URL, Git user name and Git password are encrypted before being saved. When you save the project after enabling Git repo URL, you will be prompted to enter a Team Encryption Key. This key is only saved in Window registry, you should share this key with other users of your team so that they can decrypt when they sync their local projects with the repo. DO NOT store the Team Encryption Key in the repo.