gs.calendar.appointments | An appointment system based on Google Calendars , full Kotlin

Service Account's email address. Service Account's email address.
Go to Google Cloud Platform Console
Sign in and create an API Project
Enable the Google Calendar API
Create a Service Account (for the backend) Go to Service Accounts Choose Create Service Account Enter an ID and confirm Take note of your Service Account's email address Create a key-pair credentials for your new service account, in JSON format Download the credentials and store the Credentials (one of): Encode it as Base64 and set an Environment Variable called GOOGLE_CREDENTIALS with the value Or save it on backend module's resources under src/main/resources with name google_client_secrets.json.
Create an OAuth Client ID Go to Credentials Choose Create Credentials and pick OAuth Client ID Pick Web Application In allowed origins section add this for dev localhost server: http://localhost:8081 for backend dev server http://localhost:8088 for frontend dev server (optional) (your production servers here) Confirm it. You can let allowed redirect URIs empty. We will be using Google's own sign in. Take note of your OAuth Client ID Store the Client Id (one of): Set an Environment Variable called GOOGLE_CLIENT_ID with the value Save it on model module's root under with name google_client_id.txt. Or replace the buildConfigField:API_CLIENT_ID value on model module's build.gradle.kts file.
Create a new (Google Calendar)[https://calendar.google.com/calendar/r/settings/createcalendar] Share it with the Service Account's email address you just created. This will make it available at the app Make sure it has write access to the Calendar's events when you share it
Run the backend or the webapp-bundle module to check if everything is working as expected.