Variable: JWK_THUMBPRINT_PATTERN
constJWK_THUMBPRINT_PATTERN:"^[A-Za-z0-9_-]{43}$"='^[A-Za-z0-9_-]{43}$'
Defined in: packages/contracts/src/schemas/federation.ts:203
A key id as published in a jwks: the RFC 7638 SHA-256 thumbprint of the public
key, base64url without padding, so always 43 characters. Never the custodian's
handle, which names a token and a slot and is no business of a verifier's.