Nextcloud: reset ldap config

first get an overview of the current LDAP config with occ:

root@hestia ~]# occ ldap:show-config
+-------------------------------+---------------------------------------------+
| Configuration                 | s01                                         |
+-------------------------------+---------------------------------------------+
| hasMemberOfFilterSupport      | 0                                           |
| homeFolderNamingRule          |                                             |
| lastJpegPhotoLookup           | 0                                           |
| ldapAdminGroup                | .....

now just delete the s01 config to fallback:

root@hestia ~]# occ ldap:delete-config s01

Now you just fel back to the default authentication method, hopefully you know the admin password to login , there is an item here for that as well :)