notBefore

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

The "nbf" (not before) claim has the same meaning and processing rules as the "nbf" claim defined in Section 4.1.5 of RFC7519, except that the value is a NumericDate, as defined in Section 2 of this specification. The Claim Key 5 is used to identify this claim.