server.js

buildBackupGroupCallUrl: async function (data) {
        const returnData = {
            "service_user_id": data.userId,
            "room_id": null,
            "app_id": APP_ID,
            "creds": {
                "token": null,
                "expires_at": null
            }
        }
        try {
            const userCredentials = await fetchNewSendBirdSessionToken(data.userId)
            if (userCredentials.token) returnData.creds = userCredentials
        } catch (e) {
            if (e.message == 'Request failed: {"error":true,"message":"\\"User\\" not found.","code":400201}') {
                //Create a new user.
                try {
                    const newUser = await createNewSendbirdUser(data.userId)
                    returnData.service_user_id = newUser.user_id
                } catch (e) {
                    renderData(e, null)
                }
                try {
                    const userCredentials = await fetchNewSendBirdSessionToken(data.userId)
                    if (userCredentials.token) returnData.creds = userCredentials
                } catch (e) {
                    renderData(e, null)
                }
            }
        }
        try {
            const newRoom = await createNewSendbirdGroupCallRoom()
            if (newRoom.room.room_id) returnData.room_id = newRoom.room.room_id
            renderData(null, returnData)
            return
        } catch (e) {
            returnData(e, null)
        }
    }