diff --git a/application/Espo/Core/Utils/Client/ActionRenderer.php b/application/Espo/Core/Utils/Client/ActionRenderer.php
index deb50293f8..e31ed09a49 100644
--- a/application/Espo/Core/Utils/Client/ActionRenderer.php
+++ b/application/Espo/Core/Utils/Client/ActionRenderer.php
@@ -51,7 +51,12 @@ class ActionRenderer
      */
     public function write(Response $response, Params $params): void
     {
-        $body = $this->render($params->getController(), $params->getAction(), $params->getData());
+        $body = $this->render(
+            $params->getController(),
+            $params->getAction(),
+            $params->getData(),
+            $params->initAuth()
+        );
 
         $this->clientManager->writeHeaders($response);
         $response->writeBody($body);
@@ -61,12 +66,15 @@ class ActionRenderer
      * @deprecated Use`write`.
      * @param ?array<string,mixed> $data
      */
-    public function render(string $controller, string $action, ?array $data = null): string
+    public function render(string $controller, string $action, ?array $data = null, bool $initAuth = false): string
     {
         $encodedData = Json::encode($data);
 
+        $initAuthPart = $initAuth ? "app.initAuth();" : '';
+
         $script =
             "
+                {$initAuthPart}
                 app.doAction({
                     controllerClassName: '{$controller}',
                     action: '{$action}',
diff --git a/application/Espo/Core/Utils/Client/ActionRenderer/Params.php b/application/Espo/Core/Utils/Client/ActionRenderer/Params.php
index c7e75774fe..45b87329b5 100644
--- a/application/Espo/Core/Utils/Client/ActionRenderer/Params.php
+++ b/application/Espo/Core/Utils/Client/ActionRenderer/Params.php
@@ -38,6 +38,7 @@ class Params
     private string $action;
     /** @var ?array<string, mixed> */
     private ?array $data;
+    private bool $initAuth = false;
 
     /**
      * @param ?array<string, mixed> $data
@@ -57,6 +58,25 @@ class Params
         return new self($controller, $action, $data);
     }
 
+    /**
+     * @param array<string, mixed> $data
+     */
+    public function withData(array $data): self
+    {
+        $obj = clone $this;
+        $obj->data = $data;
+
+        return $obj;
+    }
+
+    public function withInitAuth(bool $initAuth = true): self
+    {
+        $obj = clone $this;
+        $obj->initAuth = $initAuth;
+
+        return $obj;
+    }
+
     public function getController(): string
     {
         return $this->controller;
@@ -74,4 +94,9 @@ class Params
     {
         return $this->data;
     }
+
+    public function initAuth(): bool
+    {
+        return $this->initAuth;
+    }
 }
diff --git a/application/Espo/Core/Utils/ClientManager.php b/application/Espo/Core/Utils/ClientManager.php
index 997b4f5844..aa568ff023 100644
--- a/application/Espo/Core/Utils/ClientManager.php
+++ b/application/Espo/Core/Utils/ClientManager.php
@@ -29,14 +29,10 @@
 
 namespace Espo\Core\Utils;
 
-use Espo\Core\{
-    Api\Response,
-    Api\ResponseWrapper,
-    Utils\File\Manager as FileManager,
-    Utils\Client\DevModeJsFileListProvider,
-    Utils\Module,
-    Utils\Json,
-};
+use Espo\Core\Api\Response;
+use Espo\Core\Api\ResponseWrapper;
+use Espo\Core\Utils\Client\DevModeJsFileListProvider;
+use Espo\Core\Utils\File\Manager as FileManager;
 
 use Slim\Psr7\Response as Psr7Response;
 use Slim\ResponseEmitter;
@@ -47,29 +43,21 @@ use Slim\ResponseEmitter;
 class ClientManager
 {
     protected string $mainHtmlFilePath = 'html/main.html';
-
     protected string $runScript = "app.start();";
-
     private string $basePath = '';
-
     private string $libsConfigPath = 'client/cfg/libs.json';
 
-    private Config $config;
-
-    private ThemeManager $themeManager;
-
-    private Metadata $metadata;
-
-    private FileManager $fileManager;
-
-    private DevModeJsFileListProvider $devModeJsFileListProvider;
-
-    private Module $module;
-
     private string $nonce;
 
     private const APP_DESCRIPTION = "EspoCRM - Open Source CRM application.";
 
+    private Config $config;
+    private ThemeManager $themeManager;
+    private Metadata $metadata;
+    private FileManager $fileManager;
+    private DevModeJsFileListProvider $devModeJsFileListProvider;
+    private Module $module;
+
     public function __construct(
         Config $config,
         ThemeManager $themeManager,
diff --git a/application/Espo/EntryPoints/LoginAs.php b/application/Espo/EntryPoints/LoginAs.php
index 41bd7c8e29..b16fa059b4 100644
--- a/application/Espo/EntryPoints/LoginAs.php
+++ b/application/Espo/EntryPoints/LoginAs.php
@@ -34,14 +34,13 @@ use Espo\Core\EntryPoint\EntryPoint;
 use Espo\Core\EntryPoint\Traits\NoAuth;
 use Espo\Core\Api\Request;
 use Espo\Core\Api\Response;
-use Espo\Core\Utils\ClientManager;
-use Espo\Core\Utils\Json;
+use Espo\Core\Utils\Client\ActionRenderer;
 
 class LoginAs implements EntryPoint
 {
     use NoAuth;
 
-    public function __construct(private ClientManager $clientManager) {}
+    public function __construct(private ActionRenderer $actionRenderer) {}
 
     /**
      * @throws BadRequest
@@ -54,24 +53,14 @@ class LoginAs implements EntryPoint
             throw new BadRequest("No anotherUser.");
         }
 
-        $data = [
-            'anotherUser' => $anotherUser,
-            'username' => $request->getQueryParam('username'),
-        ];
-
-        $encodedData = Json::encode($data);
-
-        $script =
-            "
-                app.initAuth();
-                app.doAction({
-                    controllerClassName: 'controllers/login-as',
-                    action: 'login',
-                    options: {$encodedData},
-                });
-            ";
-
-        $this->clientManager->writeHeaders($response);
-        $response->writeBody($this->clientManager->render($script));
+        $this->actionRenderer->write(
+            $response,
+            ActionRenderer\Params::create('controllers/login-as', 'login')
+                ->withData([
+                    'anotherUser' => $anotherUser,
+                    'username' => $request->getQueryParam('username'),
+                ])
+                ->withInitAuth()
+        );
     }
 }