Add Query Params for Items API (>quantity, <quantity)

[haseefathi]

As a API User
I need to filter my results with a query string
So that I get only the records I need

Details and Assumptions

• need to modify the current list items API by processing query string from the URL that filters the results
• filter by quantity > some value, quantity < some value.

Acceptance Criteria

Given customer_id
When list items API is called with query parameter: quantity > 2
Then only items with quantity > 2 will be returned