code: def read_config_file(self, config_data=None, quiet=False):
          
          if config_data is None:
              config_data = {}
  
          if os.path.exists(self.config):
  
              try:
                  if os.name != 'nt':
                      permissions = os.stat(self.config).st_mode
                      if (permissions & 4) or (permissions & 32):
                          print(
                              'Warning: Your Kaggle API key is readable by other '
                              'users on this system! To fix this, you can run ' +
                              '\'chmod 600 {}\''.format(self.config))
  
                  with open(self.config) as f:
                      config_data = json.load(f)
              except:
                  pass
  
          else:
  
              # Warn the user that configuration will be reliant on environment
              if not quiet:
                  print('No Kaggle API config file found, will use environment.')
  
          return config_data
docs: read_config_file is the first effort to get a username
             and key to authenticate to the Kaggle API. Since we can get the
             username and password from the environment, it's not required.
  
             Parameters
             ==========
             config_data: the Configuration object to save a username and
                          password, if defined
             quiet: suppress verbose print of output (default is False)