LDAP : deleted LDAP imported user in Nextcloud, can't import it anymore

Hello.

I successfully linked an AD (Synology AD) to Nextcloud.

I imported one user (login in with AD account).

In Nextcloud account, I (stupid inside) deleted this account from the account list.

Now, I can’t log in anymore, like if import from AD was impossible with the account.

Any means I can use to re-import it again ?

Thanks !