Healthcare EMR Integration with OAuth 2.0

I need a lightweight proof-of-concept that demonstrates an end-to-end OAuth 2.0 flow against a real healthcare EMR, then uses the granted token to call the FHIR Patient endpoint. The aim is simple: confirm... (Budget: $30 - $250 USD, Jobs: API Development, Backend Development, Golang, JSON, OAuth, RESTful API, Software Development, Software Engineering, Web Development)