diff --git a/composer.json b/composer.json
index 12d3c40..bc98cba 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,7 @@
 {
     "require": {
         "flashwave/index": "^0.2410",
+        "flashii/apii": "^0.2",
         "erusev/parsedown": "~1.6",
         "sentry/sdk": "^4.0"
     },
diff --git a/composer.lock b/composer.lock
index 16aefdc..5c8c6a4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0fcc2129a9e1c99597116e91c7bb2df1",
+    "content-hash": "f71663659023233c6bbd47cc74f1d954",
     "packages": [
         {
             "name": "erusev/parsedown",
@@ -56,6 +56,43 @@
             },
             "time": "2019-12-30T22:54:17+00:00"
         },
+        {
+            "name": "flashii/apii",
+            "version": "v0.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://patchii.net/flashii/apii-php.git",
+                "reference": "6a93d31375dd7e75ff9264f3024f2208ce602f49"
+            },
+            "require": {
+                "php": ">=8.1"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^1.12",
+                "phpunit/phpunit": "^10.5"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Flashii\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "bsd-3-clause-clear"
+            ],
+            "authors": [
+                {
+                    "name": "flashwave",
+                    "email": "packagist@flash.moe",
+                    "homepage": "https://flash.moe",
+                    "role": "mom"
+                }
+            ],
+            "description": "Client library for the Flashii.net API.",
+            "homepage": "https://api.flashii.net",
+            "time": "2024-11-16T16:03:42+00:00"
+        },
         {
             "name": "flashwave/index",
             "version": "v0.2410.191603",
diff --git a/public/index.php b/public/index.php
index cda0723..aedf6f5 100644
--- a/public/index.php
+++ b/public/index.php
@@ -1,24 +1,29 @@
 <?php
 namespace Seria;
 
-use Seria\Auth\ChatAuth;
+use Flashii\{FlashiiClient,FlashiiUrls};
+use Flashii\Credentials\MisuzuCredentials;
 use Seria\Users\UserInfo;
 
 require_once __DIR__ . '/../seria.php';
 
 $authToken = (string)filter_input(INPUT_COOKIE, 'msz_auth');
-$authInfo = ChatAuth::attempt($cfg->scopeTo('cauth'), $authToken);
+$flashii = new FlashiiClient('Seria', new MisuzuCredentials($authToken), new FlashiiUrls(
+    $cfg->getString('apii:api', FlashiiUrls::PROD_API_URL),
+    $cfg->getString('apii:id', FlashiiUrls::PROD_ID_URL)
+));
+$authInfo = $flashii->v1()->me();
 
-if($authInfo->success) {
+if($authInfo !== null) {
     $users = $seria->getUsersContext()->getUsers();
-    $users->syncChatUser($authInfo);
-    $sUserInfo = $users->getUser($authInfo->user_id, 'id');
+    $users->syncApiUser($authInfo);
+    $sUserInfo = $users->getUser($authInfo->getId(), 'id');
     $seria->getAuthInfo()->setInfo($sUserInfo);
 } else $sUserInfo = null;
 
 $seria->startCSRFP(
     $cfg->getString('csrfp:secret', 'mewow'),
-    $authInfo->success ? $authToken : (string)filter_input(INPUT_SERVER, 'REMOTE_ADDR')
+    $authInfo === null ? (string)filter_input(INPUT_SERVER, 'REMOTE_ADDR') : $authToken
 );
 
 $seria->startTemplating();
diff --git a/src/Auth/ChatAuth.php b/src/Auth/ChatAuth.php
deleted file mode 100644
index 0f99977..0000000
--- a/src/Auth/ChatAuth.php
+++ /dev/null
@@ -1,55 +0,0 @@
-<?php
-namespace Seria\Auth;
-
-use stdClass;
-use Index\Config\Config;
-
-final class ChatAuth {
-    public static function attempt(Config $config, string $cookie): object {
-        if(!empty($cookie)) {
-            $method = 'Misuzu';
-            $signature = sprintf('verify#%s#%s#%s', $method, $cookie, $_SERVER['REMOTE_ADDR']);
-            $signature = hash_hmac('sha256', $signature, $config->getString('secret'));
-
-            $login = curl_init($config->getString('endpoint'));
-            curl_setopt_array($login, [
-                CURLOPT_AUTOREFERER => false,
-                CURLOPT_FAILONERROR => false,
-                CURLOPT_FOLLOWLOCATION => true,
-                CURLOPT_HEADER => false,
-                CURLOPT_POST => true,
-                CURLOPT_POSTFIELDS => http_build_query([
-                    'method' => $method,
-                    'token' => $cookie,
-                    'ipaddr' => $_SERVER['REMOTE_ADDR'],
-                ], '', '&', PHP_QUERY_RFC3986),
-                CURLOPT_RETURNTRANSFER => true,
-                CURLOPT_TCP_FASTOPEN => true,
-                CURLOPT_CONNECTTIMEOUT => 2,
-                CURLOPT_MAXREDIRS => 2,
-                CURLOPT_PROTOCOLS => CURLPROTO_HTTPS,
-                CURLOPT_TIMEOUT => 5,
-                CURLOPT_USERAGENT => 'Seria',
-                CURLOPT_HTTPHEADER => [
-                    'Content-Type: application/x-www-form-urlencoded',
-                    'X-SharpChat-Signature: ' . $signature,
-                ],
-            ]);
-            $userInfo = json_decode(curl_exec($login));
-            curl_close($login);
-        }
-
-        if(empty($userInfo->success)) {
-            $userInfo = new stdClass;
-            $userInfo->success = false;
-            $userInfo->user_id = 0;
-            $userInfo->username = 'Anonymous';
-            $userInfo->colour_raw = 0x40000000;
-            $userInfo->rank = 0;
-            $userInfo->hierarchy = 0;
-            $userInfo->perms = 0;
-        }
-
-        return $userInfo;
-    }
-}
diff --git a/src/Users/Users.php b/src/Users/Users.php
index fcb3567..adfc4a1 100644
--- a/src/Users/Users.php
+++ b/src/Users/Users.php
@@ -3,6 +3,7 @@ namespace Seria\Users;
 
 use InvalidArgumentException;
 use RuntimeException;
+use Flashii\V1\Users\V1User;
 use Index\XString;
 use Index\Colour\Colour;
 use Index\Db\{DbConnection,DbStatementCache};
@@ -18,21 +19,16 @@ class Users {
         return XString::random(48);
     }
 
-    public function syncChatUser(object $authInfo): void {
-        if(!$authInfo->success)
-            return;
-
-        $userColourFixed = /*($authInfo->colour_raw & 0x40000000) ? null :*/ $authInfo->colour_raw;
-        $stmt = $this->cache->get('INSERT INTO ser_users (user_id, user_name, user_colour, user_rank, user_permissions) VALUES (?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE user_name = ?, user_colour = ?, user_rank = ?, user_permissions = ?');
-        $stmt->addParameter(1, $authInfo->user_id);
-        $stmt->addParameter(2, $authInfo->username);
-        $stmt->addParameter(3, $userColourFixed);
-        $stmt->addParameter(4, $authInfo->rank);
-        $stmt->addParameter(5, $authInfo->perms);
-        $stmt->addParameter(6, $authInfo->username);
-        $stmt->addParameter(7, $userColourFixed);
-        $stmt->addParameter(8, $authInfo->rank);
-        $stmt->addParameter(9, $authInfo->perms);
+    public function syncApiUser(V1User $authInfo): void {
+        $userColourUnfixed = $authInfo->getColourRaw() ?? 0x40000000;
+        $stmt = $this->cache->get('INSERT INTO ser_users (user_id, user_name, user_colour, user_rank, user_permissions) VALUES (?, ?, ?, ?, 0) ON DUPLICATE KEY UPDATE user_name = ?, user_colour = ?, user_rank = ?');
+        $stmt->nextParameter($authInfo->getId());
+        $stmt->nextParameter($authInfo->getName());
+        $stmt->nextParameter($userColourUnfixed);
+        $stmt->nextParameter($authInfo->getRank());
+        $stmt->nextParameter($authInfo->getName());
+        $stmt->nextParameter($userColourUnfixed);
+        $stmt->nextParameter($authInfo->getRank());
         $stmt->execute();
     }