docs: def load(provider, config_location=DEFAULT_CONFIG_DIR):
      """Load provider specific auth info from file """
  
      auth = None
      auth_file = None
      try:
          config_dir = os.path.join(config_location, NOIPY_CONFIG)
          print("Loading stored auth info [%s]... " % config_dir, end="")
          auth_file = os.path.join(config_dir, provider)
          with open(auth_file) as f:
              auth_key = f.read()
              auth = ApiAuth.get_instance(auth_key.encode('utf-8'))
          print("OK.")
      except IOError as e:
          print('{0}: "{1}"'.format(e.strerror, auth_file))
          raise e
  
      return auth