def METHOD_NAME():
    assert os.path.exists(student_files_dir+'/user_info.json')
    user_info = js.load(open(student_files_dir+'/user_info.json', 'r'))
    for i in range(len(user_info)):
        u = user_info[i]
        print('STOP', i, '/', len(user_info))
        run_cmd(f'docker rm -f {u["name"]}')