Returns a list of DBSecurityGroup descriptions. If a DBSecurityGroupName is specified, the list will contain only the descriptions of the specified DB security group.
DBSecurityGroupName: The name of the DB security group to return details for.
Filters: This parameter isn't currently supported.
MaxRecords: The maximum number of records to include in the response. If more records exist than the specified MaxRecords value, a pagination token called a marker is included in the response so that you can retrieve the remaining results.
Default: 100
Constraints: Minimum 20, maximum 100.
Marker: An optional pagination token provided by a previous describe_db_security_groups
request. If this parameter is specified, the response includes only records beyond the marker, up to the value specified by MaxRecords.