If this prompts for login/pass, edit /path/to/devDirectory/allMyProjects/projectName/.git/config :
change : url = https://github.com/myGitLogin/projectName
into : url = git@github.com:myGitLogin/projectName
And it should work (source : 1, 2)
Starting from the workstation :
mkdir projectName;cd projectName
git init
Declare remote (GitHub) repository (unless already created in the GitHub Web UI) :