Note: This endpoint should be called only after selfie and front-id both are over.
It is validating user's selfie against photo from ID (1:1 recognition). Also, this call validates if user already exists in the system (1:N recognition).
It is highly recommended that before calling this process-face endpoint, one should first finish following endpoints: add-front, add-back(not required in case of passports), process-id and add-selfie in order to get complete result view based on id verification, face recognition and liveness.