expiration

@SerialName(value = "exp")
@Serializable(with = InstantLongSerializer::class)
val expiration: Instant? = null(source)

The "exp" (expiration time) claim has the same meaning and processing rules as the "exp" claim defined in Section 4.1.4 of RFC7519, except that the value is a NumericDate, as defined in Section 2 of this specification. The Claim Key 4 is used to identify this claim.