Wrong number of segments - auth0 token

I've implemented authentication through auth0 on my laravel application, the login works fine and it returns a token and user details, here is the code for the login:

            $auth0Response = $guzzle->post('myauthurl/token', [
            'header' => [
                "content-type"=>"application/x-www-form-urlencoded"
            ],
            'form_params' => [
                'grant_type'=> "password",
                "username"=>trim($data["username"]),
                "password"=>trim($data["password"]),
                "client_id"=>"myclient_secret",
                "client_secret"=>"secret",
                "audience"=>"https://myurl.auth0.com/userinfo"
            ]
        ]);

        $auth0ResponseBody = json_decode($auth0Response->getBody(),true);
        $additionalDetails = $this->getUserDetails(trim($data["username"]));
        $userDetails = array_merge($auth0ResponseBody,$additionalDetails);

but when I get the token from the response, pass it on my request headers and try to access a protected route, I get an error with message 'Wrong number of segments

{
"error": {
    "message": "Wrong number of segments",
    "statusCode": 401
}

}