Fatal error: Uncaught DomainException: Unable to read the credential file specified by GOOGLE_APPLICATION_CREDENTIALS: file ./api-project-23931575-firebase-adminsdk-hehdi-31d5807711.json does not exist in D:\Server\ProjectMH\vendor\google\auth\src\CredentialsLoader.php:80 Stack trace: #0 D:\Server\ProjectMH\vendor\google\auth\src\ApplicationDefaultCredentials.php(160): Google\Auth\CredentialsLoader::fromEnv() #1 D:\Server\ProjectMH\vendor\google\apiclient\src\Client.php(1239): Google\Auth\ApplicationDefaultCredentials::getCredentials('https://www.goo...', NULL, Array, Object(Google\Auth\Cache\MemoryCacheItemPool), NULL) #2 D:\Server\ProjectMH\vendor\google\apiclient\src\Client.php(300): Google\Client->createApplicationDefaultCredentials() #3 D:\Server\ProjectMH\PushNotification\SamplePush.php(10): Google\Client->fetchAccessTokenWithAssertion() #4 {main} thrown in D:\Server\ProjectMH\vendor\google\auth\src\CredentialsLoader.php on line 80