title: How to set up Azure API Management for mult-tenant API
body: <p>I have multi-tenant application, which exposes some API for our customers to use. I would like to expose it using Azure API Management. Mostly to provide Development Portal to our customers, which I find very useful, and maybe use some other features.</p>
  
  <p>If I understand correctly, our customers will set up their own subscription keys for authentication, which API Management proxy will validate.</p>
  
  <p>Question: How can I link and identify user/subscription to the tenant of my application, to ensure that only data from this tenant are returned.</p>
  
  <p>One direction I can see to explore is to use delegated sign up, which I guess will help me to link subscription to the tenant. But then still the question is how to get user id in my backend API?</p>
  
  <p>Any direction to documentation or samples is very appreciated</p>