The application has exceeded the daily quota limit for queries to the Google Books API. 

i got "message": "Quota exceeded for quota metric 'Queries' and limit 'Queries per day' of service 'books.googleapis.com' for consumer 'project_number:624717413613'.",
E/flutter (11084):         "domain": "global",
E/flutter (11084):         "reason": "rateLimitExceeded"
can you let us add are own API Key?