I've been using the OAuth2 authentication method as explained here in order to use the Bulk Data Insertion API in Adobe Analytics.
Everything worked fine so far, however I had a recent issue with the authentication data being expired. I assume this is because the refresh token wasn't used for a long time, and therefore expired. (Re-logging and re-creating authentication data worked fine)
My question is: how long is the refresh token lifespan when not used? A quick google search indicates 60 days, documentation indicates 14 days, and I'm stumped to find out which to follow.