code: def authenticate(self):
          
          # Make sure we've stored uri for use
          predix.config.set_env_value(self.use_class, 'uri', self._get_uri())
  
          self.uaac = predix.security.uaa.UserAccountAuthentication()
          self.uaac.authenticate('admin', self._get_admin_secret(),
                  use_cache=False)
          self.is_admin = True
docs: Authenticate into the UAA instance as the admin user.