code: def main():
      
      run_config = _parse_args(sys.argv[1:])
      gitlab_config = GitLabConfig(run_config.url, run_config.token)
      manager = ProjectVariablesManager(gitlab_config, run_config.project)
      output = json.dumps(manager.get(), sort_keys=True, indent=4, separators=(",", ": "))
      print(output)
docs: Main method.