cache = Cache(Cache.REDIS, endpoint="127.0.0.1", port=6379, namespace="main")
await cache.set('key:1', 1)
await cache.set('key:2', 2)
await cache.set('key:3', 3)
# delete prefix 'key:' ????
await cache.delete("key:") ??
await cache.delete("key:*") ??