GCP in Action: Migrating a LINE Bot from AI Studio to Vertex AI to Solve 429 Errors

Background Recently, the LINE business card assistant robot (linebot-namecard-python) deployed on Google Cloud Run suddenly went down. After checking the logs with gcloud logging read, the following ruthless error appeared: google.api_core.exceptions.ResourceExhausted: 429 Your billing account has exceeded its monthly spending cap. It turned out that we used the API Key provided by Google AI Studio (google.generativeai package) for rapid development, and as a result, we silently maxed out...