code: def do_add_auth(self, params):
          
          self._zk.add_auth(params.scheme, params.credential)
docs: \x1b[1mNAME\x1b[0m
          add_auth - Authenticates the session
  
  \x1b[1mSYNOPSIS\x1b[0m
          add_auth <scheme> <credential>
  
  \x1b[1mEXAMPLES\x1b[0m
          > add_auth digest super:s3cr3t