diff --git a/lib/User/Bootstrap.php b/lib/User/Bootstrap.php
index 286186a..5323d81 100644
--- a/lib/User/Bootstrap.php
+++ b/lib/User/Bootstrap.php
@@ -31,13 +31,19 @@ class Bootstrap implements BootstrapInterface
 
     protected function setContainer()
     {
+        $di = Yii::$container;
         // helpers
-        Yii::$container->set(AuthHelper::class);
+        $di->set('\Da\User\Helper\AuthHelper');
+
+        // email change strategy
+        $di->set('\Da\User\Strategy\DefaultEmailChangeStrategy');
+        $di->set('\Da\User\Strategy\InsecureEmailChangeStrategy');
+        $di->set('\Da\User\Strategy\SecureEmailChangeStrategy');
 
         // active query classes
-        Yii::$container->set(AccountQuery::class);
-        Yii::$container->set(ProfileQuery::class);
-        Yii::$container->set(TokenQuery::class);
-        Yii::$container->set(UserQuery::class);
+        Yii::$container->set('\Da\User\Query\AccountQuery');
+        Yii::$container->set('\Da\User\Query\ProfileQuery');
+        Yii::$container->set('\Da\User\Query\TokenQuery');
+        Yii::$container->set('\Da\User\Query\UserQuery');
     }
 }
diff --git a/lib/User/Contracts/StrategyInterface.php b/lib/User/Contracts/StrategyInterface.php
new file mode 100644
index 0000000..6cc9581
--- /dev/null
+++ b/lib/User/Contracts/StrategyInterface.php
@@ -0,0 +1,15 @@
+<?php
+namespace Da\User\Contracts;
+
+/**
+ *
+ * StrategyInterface.php
+ *
+ * Date: 3/12/16
+ * Time: 16:23
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+interface StrategyInterface
+{
+
+}
diff --git a/lib/User/Module.php b/lib/User/Module.php
index c711f98..a155780 100644
--- a/lib/User/Module.php
+++ b/lib/User/Module.php
@@ -1,6 +1,8 @@
 <?php
 namespace Da\User;
 
+use Da\User\Strategy\DefaultEmailChangeStrategy;
+
 /**
  *
  * Module.php
@@ -11,11 +13,34 @@ namespace Da\User;
  */
 class Module extends \yii\base\Module
 {
-    public $token
+    /**
+     * @var bool whether to allow registration process or not.
+     */
+    public $allowRegistration = true;
+    /**
+     * @var bool whether to force email confirmation to.
+     */
+    public $forceEmailConfirmation = true;
+    /**
+     * @var bool whether to allow login accounts with unconfirmed emails.
+     */
+    public $allowUnconfirmedEmailLogin = false;
+    /**
+     * @var string the class name of the strategy class to handle user's email change.
+     */
+    public $emailChangeStrategy = DefaultEmailChangeStrategy::class;
+    /**
+     * @var int the time user will be auto logged in.
+     */
+    public $rememberLoginLifespan = 1209600;
+    /**
+     * @var int the time before the confirmation token becomes invalid. Defaults to 24 hours.
+     */
+    public $tokenConfirmationLifespan = 86400;
     /**
      * @var int the time before a recovery token is invalid. Defaults to 6 hours.
      */
-    public $tokenRecoveryWithin = 21600;
+    public $tokenRecoveryLifespan = 21600;
     /**
      * @var array a list of admin usernames
      */
diff --git a/lib/User/Strategy/DefaultEmailChangeStrategy.php b/lib/User/Strategy/DefaultEmailChangeStrategy.php
new file mode 100644
index 0000000..1f8b91a
--- /dev/null
+++ b/lib/User/Strategy/DefaultEmailChangeStrategy.php
@@ -0,0 +1,17 @@
+<?php
+namespace Da\User\Strategy;
+
+use Da\User\Contracts\StrategyInterface;
+
+/**
+ *
+ * DefaultEmailChangeStrategy.php
+ *
+ * Date: 3/12/16
+ * Time: 16:22
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+class DefaultEmailChangeStrategy implements StrategyInterface
+{
+
+}
diff --git a/lib/User/Strategy/InsecureEmailChangeStrategy.php b/lib/User/Strategy/InsecureEmailChangeStrategy.php
new file mode 100644
index 0000000..ecc9276
--- /dev/null
+++ b/lib/User/Strategy/InsecureEmailChangeStrategy.php
@@ -0,0 +1,17 @@
+<?php
+namespace Da\User\Strategy;
+
+use Da\User\Contracts\StrategyInterface;
+
+/**
+ *
+ * InsecuredEmailChangeStrategy.php
+ *
+ * Date: 3/12/16
+ * Time: 16:21
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+class InsecuredEmailChangeStrategy implements StrategyInterface
+{
+
+}
diff --git a/lib/User/Strategy/SecureEmailChangeStrategy.php b/lib/User/Strategy/SecureEmailChangeStrategy.php
new file mode 100644
index 0000000..41b46fc
--- /dev/null
+++ b/lib/User/Strategy/SecureEmailChangeStrategy.php
@@ -0,0 +1,17 @@
+<?php
+namespace Da\User\Strategy;
+
+use Da\User\Contracts\StrategyInterface;
+
+/**
+ *
+ * SecuredEmailChangeStrategy.php
+ *
+ * Date: 3/12/16
+ * Time: 16:20
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+class SecureEmailChangeStrategy implements StrategyInterface
+{
+
+}