What is the "Immunization PIN" described here? https://www.innovation-lab.ca/preparing-immunization-pin/ Where is it documented?
Sorry, I noted that already in my question. That page describes how to use the immunization pin in the request as the Immunization_Context http header, but it doesn't describe what the immunization pin is. I think I know how to obtain one personally, but I need some documentation to describe what this is to my employer so we can plan how patients will use this app we are making.