.env:
GOOGLE_CALENDAR_CREDENTIALS_PATH=storage/app/google-calendar.json //ideti faila
GOOGLE_CALENDAR_ID=testas@calendartest-8.iam.gserviceaccount.com //pakeist i savo


Go to Google Cloud Console
Create a new project
Enable Google Calendar API
Create OAuth 2.0 Credentials (Service Account)
Download the JSON key file and store it in your Laravel project (storage/app/google-calendar.json)