Cognos promptmany and SSAS member unique name

When you want to supply prompt values to a Cognos Report Studio report via URL (or for any other reason it is only possible to pass through values as plain text ID's and not member unique names) dealing with the parameters might not be as straight forward as it seems in the beginning. As an example let us use CRM application that links customer ID to a sales report in Cognos BI. That means we would be running the Cognos report via a url that looks similar to this: