Imports of package authenticator

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
k8s.io/apiserver/pkg/authentication/userPackage user contains utilities for dealing with simple user exchange in the auth packages.
net/httpPackage http provides HTTP client and server implementations.