Config credentials: topic

Author: andreyaksenov

doc/concepts/configuration.rst

@@ -451,5 +451,6 @@ To learn more about the persistence mechanism in Tarantool, see the :ref:`Persis
     configuration/configuration_etcd
     configuration/configuration_code
     configuration/configuration_connections
+    configuration/configuration_credentials
     configuration/configuration_authentication
     .. configuration/configuration_migrating

doc/concepts/configuration/configuration_credentials.rst

@@ -0,0 +1,12 @@
+..  _configuration_credentials:
+
+Credentials
+===========
+
+Tarantool enables flexible management of access to various database resources by providing specific privileges to users.
+You can read more about the main concepts of Tarantool access control system in the :ref:`authentication` section.
+
+This topic describes how to create users and grant them the specified privileges in the :ref:`credentials <configuration_reference_credentials>` section of a YAML configuration.
+This might be used to create specific users used in communications between Tarantool instances.
+For example, such users can be created to maintain replication and sharding in a Tarantool cluster.
+