code: func (idp *IDP) refreshCache(key string) {
  	switch key {
  	case VerifyPublicKey:
  		idp.cacheVerificationKey()
  		return
  
  	case ConsentPrivateKey:
  		idp.cacheConsentKey()
  		return
  
  	default:
  		// Will get here for client IDs.
  		// Fine to just let them expire, the next request from that
  		// client will trigger a refresh
  		return
  	}
  }
docs: // Called when any key expires