您能否提供信息/链接我如何通过 AWS SAM 创建下一个：
1. Go to services → CloudWatch → Rules → click on Create rule .
2. Event Source → choose Event Pattern → select CloudWatch Logs in Service Name , AWS API Call via CloudTrail in Event Type (If you don’t have Trail setup in CloudTrail, do first. To get help refer this document), CreateLogGroup in Specific operation(s)→ Targets → select Lambda function → select previously created lambda function → click on Configure details .
3. Give Name, Description, State should be enabled → click on Create rule .
（取自https://medium.com/tensult/manage-aws-cloudwatch-log-group-retention-using-automation-26add478b0c5文章。）
我没有找到任何信息，如何在 AWS SAM template.yaml 文件中为 lambda 函数（步骤 2）描述此事件源/事件类型（通过 CloudTrail 调用 AWS API）。
抱歉，如果我为这个问题提供的标题不完全正确，我不确定如何正确提问 - ping 我，我会更改它。