oauth2: cannot fetch token

[loveling]

i get an err

unknown error while making an http call: Post "https://fcm.googleapis.com/v1/projects/ghgame001/messages:send": oauth2: cannot fetch token: Post "https://oauth2.googleapis.com/token"

my code
`
ctx := context.Background()
app, err := firebase.NewApp(ctx, nil)
if err != nil {
log.Fatalln(err)
}

fcm, err := app.Messaging(ctx)
if err != nil {
	log.Fatalln(err)
}
token := "dVx1GC0taEhOo7om0EzZra:APA91bFyILOW0CFIYBjwIOAfg5AYlDQAowNbXfA4vDMQHOj3vnmhUETsNpup3NP2L_9JLSi4EmY_wiQYueaCWn3q2fgqeVq1iphq6l3frd06uQCKrswzUsdz1pl8rSTJykgOC_HgqIsE"

m := messaging.Message{
	Data: map[string]string{
		"temp":     "58.0F",
		"humidity": "47",
		"wind":     "18mph",
	},
	Token: token,
}
resp, err := fcm.SendDryRun(ctx, &m)
if err != nil {
	log.Fatalln(err)
}
log.Println("Message verified:", resp)`

[Google Open Source Bot]

I found a few problems with this issue:

• I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.
• This issue does not seem to follow the issue template. Make sure you provide all the required information.

[Lahiru Maramba]

Hi, our integration tests and nightly builds do not show any issues on this API. If you are still experiencing this issue please provide us with a minimal repro so we can take a look at it. Thanks!

[loveling]

thanks, my local proxy is wrong