LDAP and local accounts

My TeamPass is LDAP connected (AD) and logons of AD users works fine.
But I want to add the next local admin account (like an account "admin" is and I can do local login with it). After creating new user (admin_kb7777) I can't login, beacuse there is no such account at my ldap (and I don't want to add it to my AD; it has to be local teampass account).