service/googlechat/example_credentials.json
{
"type": "service_account",
"project_id": "123abc",
"private_key_id": "abc",
"private_key": "def",
"client_email": "user@example.com",
"client_id": "321",
"auth_uri": "",
"token_uri": "",
"auth_provider_x509_cert_url": "",
"client_x509_cert_url": ""
}