I'm working on a project that will exclusively rely on one Spotify account, but I'm having trouble grasping the concept of the refresh token in oauth2. Ideally, I want to generate an access token and refresh token through the Spotify API console once, and then use them indefinitely without the need for constant reauthorization during runtime. Can I just use the same refresh token repeatedly, or do I have to regularly obtain a new token using the refresh token every time I want to access the API?