Using microsoft graph to pull calendar data weekly

Hello- I've building an app that requests calendar access from users with Graph API. I am hoping to request permissions once and then pull calendar data weekly but I'm not sure if this is possible. I'm using the python ms-graph sdk and the interactive authentication client to request access. I am seeing some things about offline_access scope providing a refresh token but unsure how it works and the docs I found haven't been helpful. Any help would be appreciated!