Embedded App Owns data calls report based on client

[Anonymous]

Hello,

I'm trying to find resources on how to set up a third party app such that when a client logs in, they see their report only, and not any other client reports that exist in the master account. 

I would like to avoid using RLS, I plan on using a similar template copied into a new workspace for each new client. Is there a way to make it so that when a client logs into the app they only see their report without having to build a unique page for each? 

Thanks