call: vcenter REST API ,result："type":"com.vmware.vapi.std.errors.unauthenticated"

vcenter server 6.5 version (windows 2008 R2)

call vcenter  REST API in google chrome,

https://192.168.0.219/rest/vcenter/datacenter

result:

{"type":"com.vmware.vapi.std.errors.unauthenticated","value":{"messages":[{"args":[],"default_message":"This method requires authentication.","id":"vapi.method.authentication.required"}]}}