Leaderboards - wait for it to finish reading

Hey Everyone,

Trying to read my steam leaderboards, so I can compare the old score with the new one before writing (since it increments instead of replacing the stat value when writing)

However, I need to wait for it to finish reading before I can grab values from it.

Simple question - how do I use OnLeaderboardReadCompleteDelegates to wait for it to finish reading before my code continues? Or is this the wrong thing altogether?