code: def _github_create_ssh_key(cls):
          
          try:
              login = cls._user.login
              pkey_path = '{home}/.ssh/{keyname}'.format(
                  home=os.path.expanduser('~'),
                  keyname=settings.GITHUB_SSH_KEYNAME.format(login=login))
              # generate ssh key only if it doesn't exist
              if not os.path.exists(pkey_path):
                  ClHelper.run_command('ssh-keygen -t rsa -f {pkey_path}\
                                       -N \"\" -C \"DevAssistant\"'.
                                       format(pkey_path=pkey_path))
              try:
                  ClHelper.run_command('ssh-add {pkey_path}'.format(pkey_path=pkey_path))
              except exceptions.ClException:
                  # ssh agent might not be running
                  env = cls._start_ssh_agent()
                  ClHelper.run_command('ssh-add {pkey_path}'.format(pkey_path=pkey_path), env=env)
              public_key = ClHelper.run_command('cat {pkey_path}.pub'.format(pkey_path=pkey_path))
              cls._user.create_key("DevAssistant", public_key)
          except exceptions.ClException as e:
              msg = 'Couldn\'t create a new ssh key: {0}'.format(e)
              raise exceptions.CommandException(msg)
docs: Creates a local ssh key, if it doesn't exist already, and uploads it to Github.