Native Mode vs Datastore Mode u しかしCloud Firestoreを使えば良いというものでもなかった • Datastore ModeだとCloud Firestore APIが使えない Could not reach Cloud Firestore backend. Connection failed 1 times. Most recent error: FirebaseError: [code=failed-precondition]: The Cloud Firestore API is not available for Datastore Mode projects. Datastore Modeはダメ!