functions.database.ref('/users/{userId}').onWrite((event) => { console.log('Making Full Name for UserID:', event.params.userId); // Get the first and last names const firstName = event.data._newData.firstName || ''; const lastName = event.data._newData.lastName || ''; const userData = { fullName: `${firstName} ${lastName}`, }; // Add Role if it doesn't already exist if (event && event.data && event.data._data && !event.data._newData.role) { userData.role = 'user'; } return event.data.ref.update(userData); })