async def main():
    cluster = Cluster()
    (await cluster.connect())
    (await cluster.show_data())
    (await cluster.clean())
    (await cluster.show_data())
    (await cluster.close())
async def main():
    cluster = Cluster()
    (await cluster.connect())
    (await cluster.show_data())
    (await cluster.clean())
    (await cluster.show_data())
    (await cluster.close())