# Unable to login with your PIN, Fingerprint, or Face ID

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WebAuthn is a secure and convenient way to authenticate to your DAT Account using your device's built-in biometric capabilities.

#### How to register your device to WebAuthn

1. Open your web browser and navigate to [one.dat.com](https://one.dat.com/).
2. Enter your email address, and click **CONTINUE**.
   
3. Enter your password
   
4. A prompt will appear asking if you want to trust this device, click **CONTINUE**.

⚠️ **Important:** _Never register a device that does not belong to you (e.g., a shared, public, or borrowed device). Doing so can compromise your account’s security and allow unauthorized access._

5. If you are using a device with biometric capabilities:

- Your browser may ask for permission to use your biometric hardware (e.g., fingerprint reader or face recognition). Click **Allow**.
   - Follow the on-screen instructions to scan your fingerprint, show your face, or enter a PIN.

6. Once authentication is successful, the device will be registered and added to your account. Click **CONTINUE**.

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#### How to login using WebAuthn

1. Open your web browser and navigate to [one.dat.com](https://one.dat.com/).
2. Enter your email address and click **CONTINUE**.
3. The system will prompt you to authenticate using your registered device. Click **CONTINUE**.
   
**Note:** _If you prefer not to use WebAuthn at this time, Click Use password to authenticate with your password._
4. Scan your fingerprint, show your face, or enter a PIN as prompted.
5. Once authentication is successful, you will be logged into the application.