Send FCM function

sendFCM.ts

async function sendFCM(uid: string, payload: admin.messaging.DataMessagePayload) {

    const message: admin.messaging.MessagingPayload = {

        notification: {
            title: payload.title,
            body: payload.body,
            clickAction: 'FLUTTER_NOTIFICATION_CLICK',
        },
        data: payload,

    }

    console.log(message, uid);

    return admin.messaging().sendToTopic(uid, message);
};