docs: def load_edgegrid_client_settings():
      '''Load Akamai EdgeGrid configuration
  
      returns a (hostname, EdgeGridAuth) tuple from the following locations:
  
      1. Values specified directly in the Django settings::
          AKAMAI_CCU_CLIENT_SECRET
          AKAMAI_CCU_HOST
          AKAMAI_CCU_ACCESS_TOKEN
          AKAMAI_CCU_CLIENT_TOKEN
      2. An edgerc file specified in the AKAMAI_EDGERC_FILENAME settings
      3. The default ~/.edgerc file
  
      Both edgerc file load options will return the values from the “CCU” section
      by default. This may be customized using the AKAMAI_EDGERC_CCU_SECTION setting.
      '''
  
      if getattr(settings, 'AKAMAI_CCU_CLIENT_SECRET', None):
          # If the settings module has the values directly and they are not empty
          # we'll use them without checking for an edgerc file:
  
          host = settings.AKAMAI_CCU_HOST
          auth = EdgeGridAuth(access_token=settings.AKAMAI_CCU_ACCESS_TOKEN,
                              client_token=settings.AKAMAI_CCU_CLIENT_TOKEN,
                              client_secret=settings.AKAMAI_CCU_CLIENT_SECRET)
          return host, auth
      else:
          edgerc_section = getattr(settings, 'AKAMAI_EDGERC_CCU_SECTION', 'CCU')
  
          edgerc_path = getattr(settings, 'AKAMAI_EDGERC_FILENAME', '~/.edgerc')
          edgerc_path = os.path.expanduser(edgerc_path)
  
          if os.path.isfile(edgerc_path):
              edgerc = EdgeRc(edgerc_path)
              host = edgerc.get(edgerc_section, 'host')
              auth = EdgeGridAuth.from_edgerc(edgerc, section=edgerc_section)
              return host, auth
  
          raise InvalidAkamaiConfiguration('Cannot find Akamai client configuration!')