vendor: github.com/prometheus/client_golang v1.12.1

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/google.golang.org/api/option/credentials_go19.go

@@ -0,0 +1,23 @@
+// Copyright 2018 Google LLC.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.9
+
+package option
+
+import (
+	"golang.org/x/oauth2/google"
+	"google.golang.org/api/internal"
+)
+
+type withCreds google.Credentials
+
+func (w *withCreds) Apply(o *internal.DialSettings) {
+	o.Credentials = (*google.Credentials)(w)
+}
+
+// WithCredentials returns a ClientOption that authenticates API calls.
+func WithCredentials(creds *google.Credentials) ClientOption {
+	return (*withCreds)(creds)
+}