message: Create utc DateTime object directly
diff: @@ -25,7 +25,7 @@ export class MemoryKeyStore implements KeyStore {
  async addKey(key: AnyJWK): Promise<void> {
  this.keys.set(key.kid, {
  - createdAt: DateTime.local().toUTC(),
  + createdAt: DateTime.utc(),
  key: JSON.stringify(key),
  });
  }
  