Enum KeyData 

pub enum KeyData<'a> {
    Secret(&'a str),
    PrivateKeyPem(&'a str),
    PrivateKeyDer(&'a [u8]),
    None,
}

Encoding key types for JWT

Variants

Secret(&'a str)

Secret for HMAC algorithms

PrivateKeyPem(&'a str)

RSA or ECDSA private key in PEM format

PrivateKeyDer(&'a [u8])

RSA or ECDSA private key in DER format

None

No key (for ‘none’ algorithm)