I need to use proxy_pass directive for the upstream server which has query_string, which allows it to authenticate to the upstream server. How can i ensure that query string is pass-on with every request that goes via this reverse proxy.

My simplified configuration is

location /RetrieveProductWS {
proxy_pass https://apiserver/secure/v1.0/retrieveProductConditions?client_id=111-aaaa-2bbb&client_secret=aaaaabbbbbbccccddd

Please suggest possible way to achieve this requirement.