If your Brinks Armored app username is not being accepted while you can see you have $77 in your account, it likely indicates a login or account access issue. Here’s how you should proceed:

1. Double-check your login information:
- Make sure you are entering the correct username and password.
- Confirm you are using the same credentials created during initial account registration after activation1.
- If you’re not sure you registered online, go to the official registration page and attempt the registration process1.

2. Password and account recovery:
- Use the “Forgot Username or Password” feature if available in the Brinks Armored app or on their website to reset your credentials3.

3. App version and compatibility:
- Ensure you are using the latest version of the Brinks Armored app and that your device meets compatibility requirements (iOS 13.0 or later for iPhone)5.

4. Account verification issues:
- If your identity or information cannot be verified (wrong information, missing document, or failed security checks), your account access may be limited or denied until proper documents are submitted5.
- Make sure all of your identification and account information is up-to-date and accurate on your profile.

5. Check for system outages or maintenance:
- Sometimes, login problems are caused by technical issues or maintenance. Waiting and trying again later may help.

6. Contact Brinks customer support:
- If your username is still rejected and you can’t access your funds or resolve it through self-service, contact Brinks customer service directly. You can call their support number: 1-855-201-1352 for the Brinks Armored account1, or use the customer service page for help7.

You should not lose your $77—your funds are still associated with your account, but login or verification problems restrict access to the app and online services. Brinks support can help you regain access after verifying your identity17.