Adds a condition for a specified key attribute that consists
            of an operator and any number of AttributeValues.
            
 Declaration Syntax
 Declaration Syntax| C# | 
public void AddCondition( string keyAttributeName, QueryOperator op, List<AttributeValue> values )
 Parameters
 Parameters- keyAttributeName (String)
- Target key attribute name
- op (QueryOperator)
- Comparison operator
- values (List<(Of <(<'AttributeValue>)>)>)
- AttributeValues to compare to