code: def verify_credentials(self, delegate=None):
          "Verify a user's credentials."
          parser = txml.Users(delegate)
          return self.__downloadPage('/account/verify_credentials.xml', parserf verify_credentials(self, delegate=None):
          "Verify a user's credentials."
          parser = txml.Users(delegate)
          return self.__downloadPage('/account/verify_credentials.xml', parser)
docs: Verify a user's credentials.