public async ValueTask <IActionResult> PutAsync([FromBody] string word)
        {
            var           id       = new ActorId(word.ToLower());
            IBackendActor instance = ActorProxy.Create <IBackendActor>(id);
            await instance.AddOrUpdateAsync(CancellationToken.None);

            return(Ok());
        }
        public async ValueTask <(string key, int count)> Get(string key)
        {
            var           id       = new ActorId(key.ToLower());
            IBackendActor instance = ActorProxy.Create <IBackendActor>(id);
            int           count    = await instance.GetCountAsync(CancellationToken.None);

            return(key, count);
        }