kubernetes/staging/src/k8s.io/apiserver/pkg/authentication/token/tokenfile/tokenfile.go

type TokenAuthenticator …

// New returns a TokenAuthenticator for a single token
func New(tokens map[string]*user.DefaultInfo) *TokenAuthenticator { … }

// NewCSV returns a TokenAuthenticator, populated from a CSV file.
// The CSV file must contain records in the format "token,username,useruid"
func NewCSV(path string) (*TokenAuthenticator, error) { … }

func (a *TokenAuthenticator) AuthenticateToken(ctx context.Context, value string) (*authenticator.Response, bool, error) { … }