} else {
				took := time.Since(refreshStart).Seconds()
				if took > maxDurationSecondsForLog {
					// Log if we took a lot of time to load.
					logger.Info("IAM refresh took %.2fs", took)
				}
			}

			// Purge expired STS credentials.
			purgeStart := time.Now()
			if err := sys.store.PurgeExpiredSTS(ctx); err != nil {