TypeScript: The key 'secret' is required even if 'signed' is false

[clarkey]

bearerToken({ headerKey: "Bearer", reqKey: "token", cookie: { signed: false, key: "auth_token", }, })

Property 'secret' is missing in type '{ signed: false; key: string; }' but required in type '{ signed: boolean; key: string; secret: string; }'.ts(2741)

Perhaps 'secret' should be optional and checked for presence at runtime if 'signed' is true?