code: def get_aws_secrets_from_file(credentials_file):  # type: (str) -> Set[str]
      
      aws_credentials_file_path = os.path.expanduser(credentials_file)
      if not os.path.exists(aws_credentials_file_path):
          return set()
  
      parser = configparser.ConfigParser()
      try:
          parser.read(aws_credentials_file_path)
      except configparser.MissingSectionHeaderError:
          return set()
  
      keys = set()
      for section in parser.sections():
          for var in (
              'aws_secret_access_key', 'aws_security_token',
              'aws_session_token',
          ):
              try:
                  key = parser.get(section, var).strip()
                  if key:
                      keys.add(key)
              except configparser.NoOptionError:
                  pass
      return keys
docs: Extract AWS secrets from configuration files.
  
      Read an ini-style configuration file and return a set with all found AWS
      secret access keys.