ASYC script not ending the process

[miballe]

When calling the ASYNC script and the defined time to collect data is over, the process is not ended and remains in execution.

This like seems to be the one that is supposed to cancel the subscription consumption and end the thread, but it's not enough to end the thread:

dj-dna-streams-python/dnaStreaming/demo/show_stream_async.py

Line 34 in 93253d4

future.cancel()

As per the Google Cloud Pub/Sub documentation, the cancel() function is not enough to end the thread and there's a suggestion to use result() right after that.
https://googleapis.dev/python/pubsub/latest/subscriber/api/futures.html#google.cloud.pubsub_v1.subscriber.futures.StreamingPullFuture.cancel

Please ensure the whole process ends in a clean way when the condition is met.