Update identifiers.rst

Author: dereuromark

docs/en/identifiers.rst

@@ -38,7 +38,7 @@ Configuration options:
 
 -  **fields**: The fields for the lookup. Default is
    ``['username' => 'username', 'password' => 'password']``. You can
-   also set the field name to an array. For e.g. using
+   also set the table field name to an array. For e.g. using
    ``['login' => ['username', 'email'], 'password' => 'password']``
    will allow you to match value of either ``username`` or ``email`` columns based on your form posted ``login`` field content.
 -  **resolver**: The identity resolver. Default is