Can't sign into OAuth for business management

[Wes Kay]

Client error: `POST https://oauth2.googleapis.com/token` resulted in a `400 Bad Request` response:

{

  "error": "invalid_grant",

  "error_description": "Bad Request"

}

In my web app I was able to get to the grant permissions for the business scope but now I just keep getting this invalid_grant error. I synced my clock to server time, and I cannot figure this out at all. Installing the `"google/apiclient": "^2.7"` composer package, 

index.php:
```

$credentials = __DIR__ . '/client_secrets.json';

$client = new Google\Client();

$guzzleClient = new \GuzzleHttp\Client(array( 'curl' => array( CURLOPT_SSL_VERIFYPEER => false, ), ));

$client->setHttpClient($guzzleClient);

$client->setAuthConfig($credentials);

$client->setAccessType("offline");

$client->addScope("https://www.googleapis.com/auth/business.manage");

$redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];

$client->setRedirectUri($redirect_uri);

$my_business_account = new Google_Service_MyBusinessAccountManagement($client);

if (isset($_GET['logout'])) { // logout: destroy token

    unset($_SESSION['token']);

  die('Logged out.');

}

if (isset($_GET['code'])) { // get auth code, get the token and store it in session

    $client->authenticate($_GET['code']);

    $_SESSION['token'] = $client->getAccessToken();

}

if (isset($_SESSION['token'])) { // get token and configure client

    $token = $_SESSION['token'];

    $client->setAccessToken($token);

}

if (!$client->getAccessToken()) { // auth call 

    $authUrl = $client->createAuthUrl();

    header("Location: ".$authUrl);

    die;

}

```
client_secrets.json:
```

{

    "web": {

        "client_id": "1xxxxxxx.apps.googleusercontent.com",

        "project_id": "myid",

        "auth_uri": "https://accounts.google.com/o/oauth2/auth",

        "token_uri": "https://oauth2.googleapis.com/token",

        "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",

        "client_secret": "mysercet",

        "redirect_uris": [

            "http://localhost:8000/index.php"

        ],

        "javascript_origins": [

            "http://localhost:8000"

        ]

    }

}
```

Could it be the origin of my redirect? 

[Wes Kay]

I solved the issue, it was an issue with how it was handling the token. 

[DCM API (DoubleClick Campaign Mgr)]

Hi Wes,

 

I'm glad to hear you fix it on your end.

 

Feel free to come back to us when you have issues regarding DCM API response.

Regards,

Michael Angelo Legaspi DCM API Team

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