code: func (c *Redshift) ModifySnapshotCopyRetentionPeriod(input *ModifySnapshotCopyRetentionPeriodInput) (*ModifySnapshotCopyRetentionPeriodOutput, error) {
  	req, out := c.ModifySnapshotCopyRetentionPeriodRequest(input)
  	return out, req.Send()
  }
docs: // ModifySnapshotCopyRetentionPeriod API operation for Amazon Redshift.
  //
  // Modifies the number of days to retain snapshots in the destination AWS Region
  // after they are copied from the source AWS Region. By default, this operation
  // only changes the retention period of copied automated snapshots. The retention
  // periods for both new and existing copied automated snapshots are updated
  // with the new retention period. You can set the manual option to change only
  // the retention periods of copied manual snapshots. If you set this option,
  // only newly copied manual snapshots have the new retention period.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for Amazon Redshift's
  // API operation ModifySnapshotCopyRetentionPeriod for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeClusterNotFoundFault "ClusterNotFound"
  //   The ClusterIdentifier parameter does not refer to an existing cluster.
  //
  //   * ErrCodeSnapshotCopyDisabledFault "SnapshotCopyDisabledFault"
  //   Cross-region snapshot copy was temporarily disabled. Try your request again.
  //
  //   * ErrCodeUnauthorizedOperation "UnauthorizedOperation"
  //   Your account is not authorized to perform the requested operation.
  //
  //   * ErrCodeInvalidClusterStateFault "InvalidClusterState"
  //   The specified cluster is not in the available state.
  //
  //   * ErrCodeInvalidRetentionPeriodFault "InvalidRetentionPeriodFault"
  //   The retention period specified is either in the past or is not a valid value.
  //
  //   The value must be either -1 or an integer between 1 and 3,653.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/ModifySnapshotCopyRetentionPeriod