How do I allow a specific LDAP user to log in OpenStack?

Issue

• Let a keystone.conf

  [ldap]
  url                      = ldaps://server01.example.com,ldaps://server02.example.com
  user                     = CN=LDAPCLIENT,OU=SERVICE,OU=ADMINS,DC=EXAMPLE,DC=COM
  password                 = ************
  suffix                   = DC=EXAMPLE,DC=COM
  user_tree_dn             = DC=EXAMPLE,DC=COM
  query_scope              = sub
  user_objectclass         = person
  user_filter              = (|(memberOf=CN=OPSTACK_ADMIN,OU=GROUPS,DC=EXAMPLE,DC=COM)(memberOf=CN=OPSTACK_USER,OU=GROUPS,DC=EXAMPLE,DC=COM))
  user_id_attribute        = sAMAccountName
  user_name_attribute      = sAMAccountName
  user_mail_attribute      = mail
  user_pass_attribute      =
  user_enabled_attribute   = userAccountControl
  user_enabled_mask        = 2
  user_enabled_default     = 512
  user_attribute_ignore    = password,tenant_id,tenants
  user_allow_create        = False
  user_allow_update        = False
  user_allow_delete        = False
  
  group_objectclass        = group
  group_tree_dn            = OU=GROUPS,DC=EXAMPLE,DC=COM
  group_filter             = (CN=OPSTACK*)
  group_id_attribute       = cn
  group_name_attribute     = name
  group_allow_create       = False
  group_allow_update       = False
  group_allow_delete       = False
  
  
  use_tls                  = False
  tls_cacertfile           = /etc/ssl/certs/root-example.com.pem
  
  [identity]
  driver                   = keystone.identity.backends.ldap.Identity
  

Usually, in LDAP-backed keystone scenarios, the configurations and filters usually allows and specifies group members to be a OpenStack User.

• How do I allow a specific user that is not part of the specified groups to be a OpenStack user?