You can provide these details in Play Console. Please note the following requirements when providing login credentials:

• Your login credentials must be accessible at all times, reusable, and valid regardless of user location.
• Your login credentials must be maintained at all times without any error. For example, if your app typically requires a 2-Step Verification code or One-Time Password, make sure to provide reusable login credentials that can bypass these requirements. If the provided password expires, we may not be able to review your app and, therefore, the app may be rejected.
• Your login credentials must be provided in English. If your login credentials are typically in a non-English language, provide an English language version of all necessary login credentials via Play Console.
• If your login credentials are not numeric or alphanumeric (for example, a QR code or barcode), generate a static URL and upload it to Play Console.
• If your app requires users to set up their own password (for example, a PIN) to access in-app content, be sure to provide clear instructions.
• If your app requires login credentials involving other accounts (such as “sign in with Google, Facebook”, or similar), provide all account information with detailed instructions. Clear and simple instructions will help ensure a smooth review process.
• If your app normally uses a location-dependent password (for example, geo-gate), provide login credentials that are valid regardless of user location (for example, “master” login credentials).
• If your app does not require login credentials but you have functionalities or content behind a subscription paywall, please provide additional instructions or access details that will allow us to fully and freely access and review the app behind the paywall.

— Requirements for providing login credentials for app access, emphasis mine