Dana API Debugging for Balance Detection

Hi, I read that the balance detection is failing and the API credentials need verifying. Before I quote hours, two questions: 1. What exactly do you see when it fails — an error returned by Dana's API, a wrong balance value, or a silent failure with no response at all? 2... (Budget: $8 - $15 USD, Jobs: API, API Development, API Integration, Debugging, Laravel, MySQL, PHP, Software Architecture)