p.rotationTicker.Stop()
			}
			return
		}
	}
}

func (p *GCEPlugin) rotate() {
	if p.shouldRotate(time.Now()) {
		if _, err := p.GetPlatformCredential(); err != nil {
			gcecredLog.Errorf("credential refresh failed: %+v", err)
		}
	}
}

func (p *GCEPlugin) shouldRotate(now time.Time) bool {
	p.tokenMutex.RLock()
	defer p.tokenMutex.RUnlock()

	if p.tokenCache == "" {
		return true