Regression: Fixed flex user index with folder storage

CHANGELOG.md

@@ -9,6 +9,7 @@
     * Regression: Fixed fatal error in blueprints [#2811](https://github.com/getgrav/grav/issues/2811)
     * Regression: Fixed bad method call in FlexDirectory::getAuthorizeRule()
     * Regression: Fixed fatal error in admin if the site has custom permissions in `onAdminRegisterPermissions`
+    * Regression: Fixed flex user index with folder storage
     * Grav 1.7: Fixed saving Flex configuration with ignored values becoming null
 
 # v1.7.0-rc.5

system/blueprints/flex/user-accounts.yaml

@@ -107,7 +107,6 @@ config:
           class: 'Grav\Framework\File\Formatter\YamlFormatter'
         folder: 'account://'
         pattern: '{FOLDER}/{KEY}{EXT}'
-        key: username
         indexed: true
     search:
       options:

system/src/Grav/Common/Service/FlexServiceProvider.php

@@ -83,7 +83,7 @@ class FlexServiceProvider implements ServiceProviderInterface
                 'options' => [
                     'file' => 'user',
                     'pattern' => '{FOLDER}/{KEY:2}/{KEY}/{FILE}{EXT}',
-                    'key' => 'storage_key',
+                    'key' => 'username',
                 ],
             ];
         }