code: def load(config_file: default_config_file, passwords_key: nil, required: [])
        create_empty_file(config_file) if !File.exists?(config_file)
  
        configuration = ParseConfig.new(config_file)
  
        enforce_required_keys(configuration.params, required)
  
        convert_to_cool_format(OpenStruct.new, configuration.params, passwords_key)
      end
docs: `required`: list of strings. this currently support only keys outside a group; group names
               are not considered keys.