Fortect Key -

// 2. Convert to Uint8Array objects const publicKey = challenge: Uint8Array.from(atob(challenge), c => c.charCodeAt(0)), allowCredentials: allowCredentials.map(cred => ( type: 'public-key', id: Uint8Array.from(atob(cred.id), c => c.charCodeAt(0)), transports: cred.transports )) ;