Hi there! I see your SECU app on your iPhone isn’t accepting Face ID or your passcode and is showing the message "unable to sign in, please try again later." Let’s work through this together to get you signed in.

First, just to clarify a bit:
- Have you recently updated your iPhone’s iOS version or the SECU app itself?
- Is this the first time you’ve encountered this issue, or has it been happening repeatedly?
- Also, are you able to sign in with your credentials on another device or via the SECU website?

Meanwhile, here are some steps that often help resolve this:

1. Force close and reopen the app:
Sometimes the app can glitch. Double tap the Home button (or swipe up and hold if Face ID-only) to see open apps, then swipe the SECU app off the screen. Open it again and try signing in.

2. Toggle Face ID settings in the app:
- Open SECU app, go to More or Settings inside the app, then look for Face ID or biometric sign-in.
- Turn Face ID off, then close the app completely.
- Reopen the app and turn Face ID back on, re-enroll your face if prompted.

3. Verify Face ID in iPhone settings:
- Go to Settings > Face ID & Passcode.
- Make sure Face ID is set up and enabled for apps. Also check that your passcode is active.
- If needed, reset Face ID and set it up again.

4. Restart your iPhone:
Restarting can clear temporary glitches. Press and hold the side button with a volume button, slide to power off, then turn your phone back on.

5. Update the app and iOS:
Ensure both the SECU app and iOS 18.7 are the latest versions available. Updates can fix compatibility issues.

If you still receive that error after these steps, it could be an issue on SECU’s side — maybe a server issue or temporary outage. Checking their status page or contacting support might be necessary.

Please try these and let me know what happens. If the problem persists, I can help guide you further. Are you satisfied with these options so far?