`list` eagerly fetches all records and returns them as a list, whereas`stream` returns an iterator and lazily retrieves pages of records as you iterate over the collection. You can also page manually using the`page` method.

`page_size` as a parameter is used to tell how many records should we get in every page and`limit` parameter is used to limit the max number of records we want to fetch.

print(sms.to)

client.messages.list(limit=20,page_size=20)

This will make 1 call that will fetch 20 records from backend service.

client.messages.list(limit=20,page_size=10)

This will make 2 calls that will fetch 10 records each from backend service.

client.messages.list(limit=20,page_size=100)

This will make 1 call which will fetch 100 records but user will get only 20 records.

By default, the Twilio Client will make synchronous requests to the Twilio API. To allow for asynchronous, non-blocking requests, we've included an optional asynchronous HTTP client. When used with the Client and the accompanying`*_async` methods, requests made to the Twilio API will be performed asynchronously.