Enum TokenError 

#[non_exhaustive]
pub enum TokenError {
    Http(String),
    InvalidResponse(String),
    UnsupportedTokenType(String),
    ConfigError(String),
    Unavailable(String),
}

Errors returned by the outbound OAuth2 client credentials flow.

All variants are deliberately constructed so that secret values (client_secret, access tokens) can never appear in the formatted output.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Http(String)

HTTP transport or status error during token acquisition.

The inner string is produced by format_http_error and never contains secrets.

InvalidResponse(String)

The token endpoint returned an unparseable or incomplete response.

UnsupportedTokenType(String)

The token endpoint returned a token_type that is not Bearer.

ConfigError(String)

Configuration is invalid (e.g. both token_endpoint and issuer_url are set, or neither is set).

Unavailable(String)

The token watcher is not ready or has been shut down.

Trait Implementations

impl Debug for TokenError

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

Formats the value using the given formatter.

impl Display for TokenError

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

Formats the value using the given formatter.

impl Error for TokenError

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.