claims := xjwt.NewStandardClaims()
	claims.SetExpiry(UTCNow().Add(defaultInterNodeJWTExpiry))
	claims.SetAccessKey(accessKey)

	jwt := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, claims)
	return jwt.SignedString([]byte(secretKey))
}

// Check if the request is authenticated.
// Returns nil if the request is authenticated. errNoAuthToken if token missing.
// Returns errAuthentication for all other errors.

	claims := xjwt.NewMapClaims()
	claims.SetExpiry(UTCNow().Add(defaultJWTExpiry))
	claims.SetAccessKey(accessKey)
	token := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, claims)
	return token.SignedString([]byte(secretKey))
}

// Tests web request authenticator.
func TestWebRequestAuthenticate(t *testing.T) {
	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()

	obj, fsDir, err := prepareFS(ctx)

		ExpiresAt: time.Now().UTC().Add(defaultPrometheusJWTExpiry).Unix(),
		Subject:   s.accessKey,
		Issuer:    "prometheus",
	})

	token, err := jwt.SignedString([]byte(s.secretKey))
	c.Assert(err, nil)

	for _, cpath := range globalMetricsV3CollectorPaths {
		request, err := newTestSignedRequest(http.MethodGet, s.endPoint+minioReservedBucketPath+metricsV3Path+string(cpath),