Retrieves the JSON text of the resource-based policy document attached to the CloudTrail channel.
See https://www.paws-r-sdk.com/docs/cloudtrail_get_resource_policy/ for full documentation.
cloudtrail_get_resource_policy(ResourceArn)
[required] The Amazon Resource Name (ARN) of the CloudTrail channel attached to the
resource-based policy. The following is the format of a resource ARN:
arn:aws:cloudtrail:us-east-2:123456789012:channel/MyChannel
.