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The University of Texas system is designed to be used only by UT employees and is a secure location for code that you want to keep within a team of people employed by UT-Austin (including people with zero-time appointments). Each person needs to login to github by going to github.austingaustin.utexas.edu and using their uteid and password to login. After that one can create and be added to existing github.austin.utexas.edu repositories.