I know it's supposed to be cached locally but calling FirebaseUser.GetIdToken(false) is still very slow even for 2nd or 3rd calls (and the returned token is the same). It takes seconds for the result for some reason. I thought our API server was slow but while debugging another issue, I found out this method is what holding it back. When I introduced our own local token cache, the speed significantly improved.

Is there some special logic with this method call that makes it so slow? Also is it safe to cache the token for 50 minutes (I assume it expires in 1 hour)?