text: import configparser
  import os
  
  if 'PYB_CONFIG_FILE' in os.environ:
      CONFIG_FILE = os.environ['PYB_CONFIG_FILE']
  else:
      CONFIG_FILE = os.path.expanduser("~/.scopus/config.ini")
  try:
      config = configparser.ConfigParser()
      config.optionxform = str
      config.read(CONFIG_FILE)
  except FileNotFoundError:
      import warnings
      text = "pybliometrics did not find a configuration file.  Please issue "\
             "pybliometrics.scopus.utils.create_config() to start the process "\
             "which guides you through the generation of the configuration "\
             "file or read https://pybliometrics.readthedocs.io/en/stable/configuration.html."
      warnings.warn(text, UserWarning)
  