Hi there! I can help you with the login issue you're experiencing with the FPI Management app. When you see the message "unable to find user," it could be due to a few different factors. Let's go through some steps to help identify the problem:

1. Check Your Credentials: Please make sure you're entering the correct username and password. Double-check for any typos, especially with characters like "O" (the letter) versus "0" (the number) or similar variations.

2. Account Status: Have you recently created your account or made any changes? If your account is new, it might take some time for it to become active.

3. Reset Password: If you suspect that your login details might be incorrect, you can try resetting your password. To do this, go to the app's login page, look for a "Forgot Password?" link, and follow the prompts to create a new password.

4. App Update: Ensure that you have the latest version of the FPI Management app installed. Sometimes, outdated versions can cause login issues. You can check for updates on the app store (Google Play or App Store).

5. Internet Connection: Check if your internet connection is stable. Sometimes, intermittent connectivity can cause problems during the login process.

If you've tried these steps and the issue persists, please let me know! We can look into more advanced troubleshooting or check if there are any server-related outages. Are you satisfied with the solution I provided?