Create a metric filter

The on-call team at DataFlow Inc. has been manually scanning Lambda logs for errors each morning. They want an automated way to track error counts over time so they can set up alarms later. A metric filter on the TenantReportReader log group will convert matching log lines into a CloudWatch metric that can be graphed and alerted on.

In this exercise you will locate the Lambda log group, create a metric filter that matches ERROR log lines, and confirm the metric collects data.