diff --git a/example/kube/authelia/configs/config.yml b/example/kube/authelia/configs/config.yml
index 4d37fd158..8230fc0a9 100644
--- a/example/kube/authelia/configs/config.yml
+++ b/example/kube/authelia/configs/config.yml
@@ -22,43 +22,61 @@ logs_level: debug
 # be redirected upon successful authentication.
 default_redirection_url: https://login.kube.example.com
 
-# LDAP configuration
+# The authentication backend to use for verifying user passwords
+# and retrieve information such as email address and groups
+# users belong to.
 #
-# Example: for user john, the DN will be cn=john,ou=users,dc=example,dc=com
-ldap:
-  # The url of the ldap server
-  url: ldap://ldap-service
-
-  # The base dn for every entries
-  base_dn: dc=example,dc=com
-
-  # An additional dn to define the scope to all users
-  additional_users_dn: ou=users
-
-  # The users filter used to find the user DN
-  # {0} is a matcher replaced by username.
-  # 'cn={0}' by default.
-  users_filter: cn={0}
-
-  # An additional dn to define the scope of groups
-  additional_groups_dn: ou=groups
-
-  # The groups filter used for retrieving groups of a given user.
-  # {0} is a matcher replaced by username.
-  # {dn} is a matcher replaced by user DN.
-  # 'member={dn}' by default.
-  groups_filter: (&(member={dn})(objectclass=groupOfNames))
-
-  # The attribute holding the name of the group
-  group_name_attribute: cn
-
-  # The attribute holding the mail address of the user
-  mail_attribute: mail
-
-  # The username and password of the admin user.
-  user: cn=admin,dc=example,dc=com
-  password: password
+# There are two supported backends: `ldap` and `file`.
+authentication_backend:
+  # LDAP backend configuration.
+  #
+  # This backend allows Authelia to be scaled to more
+  # than one instance and therefore is recommended for
+  # production.
+  ldap:
+    # The url of the ldap server
+    url: ldap://ldap-service
+  
+    # The base dn for every entries
+    base_dn: dc=example,dc=com
+  
+    # An additional dn to define the scope to all users
+    additional_users_dn: ou=users
+  
+    # The users filter used to find the user DN
+    # {0} is a matcher replaced by username.
+    # 'cn={0}' by default.
+    users_filter: cn={0}
+  
+    # An additional dn to define the scope of groups
+    additional_groups_dn: ou=groups
+  
+    # The groups filter used for retrieving groups of a given user.
+    # {0} is a matcher replaced by username.
+    # {dn} is a matcher replaced by user DN.
+    # 'member={dn}' by default.
+    groups_filter: (&(member={dn})(objectclass=groupOfNames))
+  
+    # The attribute holding the name of the group
+    group_name_attribute: cn
+  
+    # The attribute holding the mail address of the user
+    mail_attribute: mail
+  
+    # The username and password of the admin user.
+    user: cn=admin,dc=example,dc=com
+    password: password
 
+  # File backend configuration.
+  #
+  # With this backend, the users database is stored in a file
+  # which is updated when users reset their passwords.
+  # Therefore, this backend is meant to be used in a dev environment
+  # and not in production since it prevents Authelia to be scaled to
+  # more than one instance.
+  #
+  ## file:
+  ##   path: ./users_database.yml
 
 # Authentication methods
 #