From the command line, use create-subscription.
Creates a trail that specifies the settings for delivery of log data to an Amazon S3 bucket. The request includes a Trail structure that specifies the following:
- Trail name.
- The name of an existing Amazon S3 bucket to which CloudTrail delivers your log files.
- The name of the Amazon S3 key prefix that precedes each log file.
- The name of an existing Amazon SNS topic that notifies you that a new file is available in your bucket.
- Whether the log file should include AWS API calls from global services. Currently, the only global AWS API calls included in CloudTrail log files are from IAM and AWS STS.
 Declaration Syntax
 Declaration Syntax| C# | 
public CreateTrailResponse CreateTrail( CreateTrailRequest createTrailRequest )
 Parameters
 Parameters- createTrailRequest (CreateTrailRequest)
- Container for the necessary parameters to execute the CreateTrail service method on AmazonCloudTrail.
 Return Value
 Return ValueThe response from the CreateTrail service method, as returned by AmazonCloudTrail.
 Exceptions
 Exceptions