hi everyone, I am starting a new project and will use medplum as our backend service. We are already hosting medplum server and app on our own server. My work primarily revolves around FHIR resources for now. I can see that the base url for fhir resources are https://api.medplum.com/fhir/R4. However, this url gives me a message i.e. unauthorized. I tried it in my own hosted server too. I cannot seem to authorize myself even though I have tried /oauth2/authorize and tried to authorize myself through it. I cannot seem to wrap my head around the authorization process that will give me access to the FHIR resources. I am trying to utilize the rest api instead of typescript sdk for this project. Any tutorials, examples, on how to deal with it on a self hosted server.