ACCESS_TOKEN_SCOPE_INSUFFICIENT 403 Request had insufficient authentication scopes domain global

to check inapp purchase i have used this api https://androidpublisher.googleapis.com/androidpublisher/v3/applications/{packageName}/purchases/products/{productId}/tokens/{token} and got this response.

{
    "error": {
        "code": 403,
        "message": "Request had insufficient authentication scopes.",
        "errors": [
            {
                "message": "Insufficient Permission",
                "domain": "global",
                "reason": "insufficientPermissions"
            }
        ],
        "status": "PERMISSION_DENIED",
        "details": [
            {
                "@type": "type.googleapis.com/google.rpc.ErrorInfo",
                "reason": "ACCESS_TOKEN_SCOPE_INSUFFICIENT",
                "domain": "googleapis.com",
                "metadata": {
                    "method": "androidpublisher.ProductPurchasesService.Get",
                    "service": "androidpublisher.googleapis.com"
                }
            }
        ]
    }
}