The following confirmation is done.
So, I was able to run normally until yesterday. But I will get an error all the time today.
I use "Cloud Translation API Client Libraries", If there are other points to check, would you please teach me?
$translate = new TranslateClient([
'projectId' => 'xxxxxxx',
]);
$result = $translate->translate('I am playing Dragon Quest 11 ', [
'source' => 'en',
'target' => 'ja',
]);
solved it myself.
Used to authorized type 'authorized_user'.
Not so match authentication method.
My solution is:
Constructor add option 'keyFilePath' directory.
$translate = new TranslateClient([
'projectId' => 'xxxxxxx',
'keyFilePath' => env('GOOGLE_APPLICATION_CREDENTIALS')
]);