code: func (c *Redshift) DescribeClusterSecurityGroups(input *DescribeClusterSecurityGroupsInput) (*DescribeClusterSecurityGroupsOutput, error) {
  	req, out := c.DescribeClusterSecurityGroupsRequest(input)
  	return out, req.Send()
  }
docs: // DescribeClusterSecurityGroups API operation for Amazon Redshift.
  //
  // Returns information about Amazon Redshift security groups. If the name of
  // a security group is specified, the response will contain only information
  // about only that security group.
  //
  // For information about managing security groups, go to Amazon Redshift Cluster
  // Security Groups (https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-security-groups.html)
  // in the Amazon Redshift Cluster Management Guide.
  //
  // If you specify both tag keys and tag values in the same request, Amazon Redshift
  // returns all security groups that match any combination of the specified keys
  // and values. For example, if you have owner and environment for tag keys,
  // and admin and test for tag values, all security groups that have any combination
  // of those values are returned.
  //
  // If both tag keys and values are omitted from the request, security groups
  // are returned regardless of whether they have tag keys or values associated
  // with them.
  //
  // 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 DescribeClusterSecurityGroups for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeClusterSecurityGroupNotFoundFault "ClusterSecurityGroupNotFound"
  //   The cluster security group name does not refer to an existing cluster security
  //   group.
  //
  //   * ErrCodeInvalidTagFault "InvalidTagFault"
  //   The tag is invalid.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/DescribeClusterSecurityGroups