title: How to export previous logs in Stackdriver
body: <p>I have a log in Stackdriver that logs every request goes into my api and failed, and I want to write a script to count on the number of times each error message appears. The problem is, the export feature in Stackdriver V2 only allow me to sink upcoming error messages, but I only care about the logs entries that already lives in the log. Is there a way to download the complete log from Stackdriver?</p>