diff --git a/lib/admin.php b/lib/admin.php
index 9bf1b91..a3283e7 100644
--- a/lib/admin.php
+++ b/lib/admin.php
@@ -1,10 +1,7 @@
 <?php
     namespace Octo;
 
-    class Admin
+    class Admin extends Authentication
     {
-        public static function __callStatic($m, $a)
-        {
-            return call_user_func_array([auth('admin', 'adminUser'), $m], $a);
-        }
+        protected $ns = 'admin', $actual = 'admin.user', $entity = 'adminUser';
     }
diff --git a/lib/auth.php b/lib/auth.php
index d832088..bbdc600 100644
--- a/lib/auth.php
+++ b/lib/auth.php
@@ -1,105 +1,4 @@
 <?php
     namespace Octo;
 
-    class Auth
-    {
-        public static function get($default = null, $ns = 'web')
-        {
-            if (session_id()) {
-                $user = session($ns)->getUser(actual('auth.user'));
-            } else {
-                $user = actual('auth.user');
-            }
-
-            if ($user) {
-                $user = !is_array($user) ? $user->toArray() : $user;
-                actual('auth.user', $user);
-
-                return $user;
-            }
-
-            return $default;
-        }
-
-        public static function make($user = null, $ns = 'web')
-        {
-            $user = $user ?: static::get($user, $ns);
-
-            if ($user) {
-                $user = !is_array($user) ? $user->toArray() : $user;
-                actual('auth.user', $user);
-
-                if (session_id()) {
-                    session($ns)->setUser($user);
-                }
-            }
-        }
-
-        public static function is($ns = 'web')
-        {
-            return 'octodummy' !== static::get('octodummy', $ns);
-        }
-
-        public static function guest($ns = 'web')
-        {
-            return 'octodummy' === static::get('octodummy', $ns);
-        }
-
-        public static function login($user, $ns = 'web')
-        {
-            $user = !is_array($user) ? $user->toArray() : $user;
-
-            actual('auth.user', $user);
-
-            if (session_id()) {
-                session($ns)->setUser($user);
-            }
-        }
-
-        public static function logout($ns = 'web')
-        {
-            if (session_id()) {
-                session($ns)->erase('user');
-            }
-
-            actual('auth.user', null);
-        }
-
-        public static function id($ns = 'web')
-        {
-            $user = static::get(null, $ns);
-
-            if ($user) {
-                return $user['id'];
-            }
-
-            return null;
-        }
-
-        public static function email($ns = 'web')
-        {
-            $user = static::get(null, $ns);
-
-            if ($user) {
-                return isAke($user, 'email', null);
-            }
-
-            return null;
-        }
-
-        public static function user($model = true, $ns = 'web', $em = 'user')
-        {
-            $user = static::get(null, $ns);
-
-            if ($user && $model) {
-                return em($em)->find((int) $user['id']);
-            }
-
-            return $user;
-        }
-
-        public static function __callStatic($m, $a)
-        {
-            return call_user_func_array([auth(), $m], $a);
-        }
-    }
+    class Auth extends Authentication {}
diff --git a/lib/authentication.php b/lib/authentication.php
new file mode 100644
index 0000000..6596154
--- /dev/null
+++ b/lib/authentication.php
@@ -0,0 +1,135 @@
+<?php
+    namespace Octo;
+
+    class Authentication
+    {
+        protected $ns = 'web', $actual = 'auth.user', $entity = 'user';
+
+        protected static function called()
+        {
+            return maker(get_called_class());
+        }
+
+        public static function get($default = null)
+        {
+            $class = static::called();
+
+            if (session_id()) {
+                $user = session($class->ns)
+                ->getUser(
+                    actual($class->actual)
+                );
+            } else {
+                $user = actual($class->actual);
+            }
+
+            if ($user) {
+                $user = !is_array($user) ? $user->toArray() : $user;
+                actual($class->actual, $user);
+
+                return $user;
+            }
+
+            return $default;
+        }
+
+        public static function make($user = null)
+        {
+            $class = static::called();
+
+            $user = $user ?: static::get($user, $class->ns);
+
+            if ($user) {
+                $user = !is_array($user) ? $user->toArray() : $user;
+                actual($class->actual, $user);
+
+                if (session_id()) {
+                    session($class->ns)->setUser($user);
+                }
+            }
+        }
+
+        public static function is()
+        {
+            $class = static::called();
+
+            return 'octodummy' !== static::get('octodummy', $class->ns);
+        }
+
+        public static function guest()
+        {
+            $class = static::called();
+
+            return 'octodummy' === static::get('octodummy', $class->ns);
+        }
+
+        public static function login($user)
+        {
+            $class = static::called();
+
+            $user = !is_array($user) ? $user->toArray() : $user;
+
+            actual($class->actual, $user);
+
+            if (session_id()) {
+                session($class->ns)->setUser($user);
+            }
+        }
+
+        public static function logout()
+        {
+            $class = static::called();
+
+            if (session_id()) {
+                session($class->ns)->erase('user');
+            }
+
+            actual($class->actual, null);
+        }
+
+        public static function id()
+        {
+            $class = static::called();
+
+            $user = static::get(null, $class->ns);
+
+            if ($user) {
+                return $user['id'];
+            }
+
+            return null;
+        }
+
+        public static function email()
+        {
+            $class = static::called();
+
+            $user = static::get(null, $class->ns);
+
+            if ($user) {
+                return isAke($user, 'email', null);
+            }
+
+            return null;
+        }
+
+        public static function user($model = true)
+        {
+            $class = static::called();
+
+            $user = static::get(null, $class->ns);
+
+            if ($user && $model) {
+                return em($class->entity)->find((int) $user['id']);
+            }
+
+            return $user;
+        }
+
+        public static function __callStatic($m, $a)
+        {
+            $class = static::called();
+
+            return call_user_func_array([auth($class->ns, $class->entity), $m], $a);
+        }
+    }