我正在运行一个安全的kubernetes集群，使用keystone进行身份验证。现在，我正在尝试运行heapster，我收到错误：
E0720 09:22:18.244161 1 reflector.go:205] k8s.io/heapster/metrics/sources/summary/summary.go:454: Failed to list *api.Node: the server has asked for the client to provide credentials (get nodes)
E0720 09:22:18.250826 1 reflector.go:205] k8s.io/heapster/metrics/processors/namespace_based_enricher.go:84: Failed to list *api.Namespace: the server has asked for the client to provide credentials (get namespaces)
我想知道如何将身份验证文件传递给heapster以及该文件应包含哪些内容？或者还有其他方法可以为heapster提供凭据吗？
TIA。