private JpaYubiKeyAccount fetchSingleYubiKeyAccount(final String username) {
        return this.entityManager.createQuery(SELECT_ACCOUNT_QUERY, JpaYubiKeyAccount.class)
            .setParameter("username", username)
            .getSingleResult();
    }
This is {@link JpaYubiKeyAccountRegistry}.

@author Misagh Moayyed
@since 5.2.0
support/cas-server-support-yubikey-jpa/src/main/java/org/apereo/cas/adaptors/yubikey/dao/JpaYubiKeyAccountRegistry.java