FHIR OAuth2 Access token issue and Authorization Issue

Hey All,
have tried to access the patients data from Demo Open EMR through FHIR using swagger and i can able to communicate and collect the patient details. Below are the details i have given while creating the client api.

If i have to acces the patient details through FHIR using python programming language. what details needed to be given in the app launch and redirect url? how will be the work flow?? how to authorize using python and access a token from open emr using fhir and read patient data?

kindly can anyone share your knowledge reg this?