Enum Error 

pub enum Error {
    Authentication,
    Exhausted,
    Unavailable,
    UserCanceled,
    InvalidActionId,
    InvalidText,
    AppCanceled,
    SystemCanceled,
    BiometryDisconnected,
    NotPaired,
    NotEnrolled,
    NotInteractive,
    CompanionNotAvailable,
    InvalidDimensions,
    PasscodeNotSet,
    UserFallback,
    UpdateRequired,
    Timeout,
    Busy,
    DisabledByPolicy,
    NotConfigured,
    Unknown,
}

An error produced during authentication.

Variants

Authentication

The user failed to provide valid credentials.

Exhausted

Authentication failed because there were too many failed attempts.

Unavailable

The requested authentication method was unavailable.

UserCanceled

The user canceled authentication.

InvalidActionId

The provided action ID is not in the policy’s allowed list.

InvalidText

The prompt text is invalid for this platform — e.g. an empty Text::apple reason or an empty AndroidText::title, which the platform APIs reject.

AppCanceled

The app canceled authentication.

This error can occur on:

• Apple

SystemCanceled

The system canceled authentication.

This error can occur on:

• Apple

BiometryDisconnected

The device supports biometry only using a removable accessory, but the paired accessory isn’t connected.

This error can occur on:

• Apple

NotPaired

The device supports biometry only using a removable accessory, but no accessory is paired.

This error can occur on:

• Apple

NotEnrolled

The user has no enrolled biometric identities.

This error can occur on:

• Apple

NotInteractive

Displaying the required authentication user interface is forbidden.

This error can occur on:

• Apple

CompanionNotAvailable

An attempt to authenticate with an Apple companion device (e.g., Apple Watch) failed.

This error can occur on:

• Apple, formerly known as WatchNotAvailable

InvalidDimensions

This error can occur on:

• Apple

PasscodeNotSet

A passcode isn’t set on the device.

This error can occur on:

• Apple

UserFallback

The user tapped the fallback button in the authentication dialog (e.g., “Use Password” instead), but you selected an authentication policy that does not support password fallback.

If you get this error, you either must handle the fallback yourself or enable the password option in the policy builder, which will instruct the system to enable a password fallback option in the authentication dialog.

This error can occur on:

• Apple

UpdateRequired

Timeout

Busy

The biometric verifier device is performing an operation and is unavailable.

This error can occur on:

• Windows

DisabledByPolicy

Group policy has disabled the biometric verifier device.

This error can occur on:

• Windows

NotConfigured

A biometric verifier device is not configured for this user.

This error can occur on:

• Windows

Unknown

An unknown error occurred.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.