FCM voor Tiqr

Prepare

Log in to the Google cloud console
Create or select a project. Copy the project ID and enter it in the config as firebase_projectId

Add a new role

Go to IAM & Admin and select roles in the left menu
Create a new role, and name it CloudMessaging in the title and id, set it to General Availibility.
Assign two permissions: cloudmessaging.messages.create and firebasecloudmessaging.messages.create and click Create

Add a new serviceaccount and key

Go to API's& Services, and click + Enable API's and Services
Search for firebase cloud messaging api and enable it
Next, go to Credentials and create a new credential. Choose for the service account, enter a name, and ID, and copy the email-address generated
Open the new user and navigate to the keys tab. Add a new key, and chose the json format. The downloaded file should be places in the config directory and configured in the config file as firebase_credentialsFile

Grant permissions

Open a cloud shell (Icon in the top-right corner).
Assign the role to the user by running : gcloud projects add-iam-policy-binding <projectID> --member=serviceAccount:<serviceaccount-email> --role=projects/<projectID/roles/CloudMessaging