code: func (c *Redshift) DescribeStorage(input *DescribeStorageInput) (*DescribeStorageOutput, error) {
  	req, out := c.DescribeStorageRequest(input)
  	return out, req.Send()
  }
docs: // DescribeStorage API operation for Amazon Redshift.
  //
  // Returns the total amount of snapshot usage and provisioned storage for a
  // user in megabytes.
  //
  // 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 DescribeStorage for usage and error information.
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/DescribeStorage