Get requests by requester or technician using serviceDesk plus REST Api

Get requests by requester or technician using serviceDesk plus REST Api

I am developing a client application where we want to show requests createdby(requester) or assignedto(technician). Referring to REST API documentation, I can find that there is no api  supporting this functionality. Only way is to get all requests and filter it out which is not preferable due to huge load time. Can you please let me know if we have an API updated for this?

Also I checked ServiceDesk plus mobile app where we have a similar functionality, would like to know how does the mobile app is able to retrieve user related requests? 

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