Added new user notification

Author: ayush221b

functions/index.js

@@ -27,4 +27,20 @@ exports.projectCreated =
         }
 
         return createNotification(notification);
+});
+
+exports.userJoined = functions.auth.user().onCreate(user => {
+
+    return admin.firestore().collection('users')
+        .doc(user.uid).get().then(doc => {
+
+            const newUser = doc.data();
+            const notification = {
+                content: 'Joined the WorkPlace!',
+                user: `${newUser.firstName} ${newUser.lastName}`,
+                time: admin.firestore.FieldValue.serverTimestamp()
+            }
+
+            return createNotification(notification);
+        })
 })