diff --git a/lib/User/Contracts/ServiceInterface.php b/lib/User/Contracts/ServiceInterface.php
new file mode 100644
index 0000000..a5bf76b
--- /dev/null
+++ b/lib/User/Contracts/ServiceInterface.php
@@ -0,0 +1,18 @@
+<?php
+namespace Da\User\Contracts;
+
+/**
+ *
+ * ServiceInterface.php
+ *
+ * Date: 4/12/16
+ * Time: 2:56
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+interface ServiceInterface
+{
+    /**
+     * @return void
+     */
+    public function run();
+}
diff --git a/lib/User/Helper/AuthHelper.php b/lib/User/Helper/AuthHelper.php
index 0506329..50ca031 100644
--- a/lib/User/Helper/AuthHelper.php
+++ b/lib/User/Helper/AuthHelper.php
@@ -1,6 +1,7 @@
 <?php
 namespace Da\User\Helper;
 
+use Da\User\Module;
 use Yii;
 
 /**
@@ -22,12 +23,24 @@ class AuthHelper
      */
     public function hasRole($userId, $role)
     {
-        if (Yii::$app->authManager) {
-            $roles = array_keys(Yii::$app->authManager->getRolesByUser($userId));
+        if (Yii::$app->getAuthManager()) {
+            $roles = array_keys(Yii::$app->getAuthManager()->getRolesByUser($userId));
 
             return in_array($role, $roles, true);
         }
 
         return false;
     }
+
+    public function isAdmin($username)
+    {
+        /** @var Module $module */
+        $module = Yii::$app->getModule('user');
+        $hasAdministratorPermissionName = Yii::$app->getAuthManager() && $module->administratorPermissionName
+            ? Yii::$app->getUser()->can($module->administratorPermissionName)
+            : false;
+
+        return $hasAdministratorPermissionName || in_array($username, $module->administrators);
+    }
+
 }
diff --git a/lib/User/Helper/SecurityHelper.php b/lib/User/Helper/SecurityHelper.php
new file mode 100644
index 0000000..13e3d60
--- /dev/null
+++ b/lib/User/Helper/SecurityHelper.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace Da\User\Helper;
+
+use yii\base\Security;
+
+class SecurityHelper
+{
+    /**
+     * @var Security
+     */
+    protected $security;
+
+    public function __construct(Security $security)
+    {
+        $this->security = $security;
+    }
+
+    /**
+     * Generates a secure hash from a password and a random salt.
+     *
+     * @param string $password
+     * @param null|int $cost
+     *
+     * @return string
+     */
+    public function generatePasswordHash($password, $cost = null)
+    {
+        return $this->security->generatePasswordHash($password, $cost);
+    }
+
+    public function validatePassword($password, $hash)
+    {
+        return $this->security->validatePassword($password, $hash);
+    }
+
+    public function generatePassword($length)
+    {
+        $sets = [
+            'abcdefghjkmnpqrstuvwxyz',
+            'ABCDEFGHJKMNPQRSTUVWXYZ',
+            '23456789',
+        ];
+        $all = '';
+        $password = '';
+        foreach ($sets as $set) {
+            $password .= $set[array_rand(str_split($set))];
+            $all .= $set;
+        }
+
+        $all = str_split($all);
+        for ($i = 0; $i < $length - count($sets); $i++) {
+            $password .= $all[array_rand($all)];
+        }
+
+        $password = str_shuffle($password);
+
+        return $password;
+    }
+}
diff --git a/lib/User/Model/User.php b/lib/User/Model/User.php
index 7bd889d..e49360b 100644
--- a/lib/User/Model/User.php
+++ b/lib/User/Model/User.php
@@ -1,7 +1,13 @@
 <?php
 namespace Da\User\Model;
 
+use Da\User\Helper\AuthHelper;
+use Da\User\Traits\ModuleTrait;
+use Da\User\Traits\ContainerTrait;
+use yii\base\NotSupportedException;
+use yii\behaviors\TimestampBehavior;
 use yii\db\ActiveRecord;
+use yii\helpers\ArrayHelper;
 use yii\web\IdentityInterface;
 use Yii;
 
@@ -25,14 +31,140 @@ use Yii;
  * @property integer $updated_at
  *
  * Defined relations:
- * @property Account[] $accounts
+ * @property SocialNetworkAccount[] $socialNetworkAccounts
  * @property Profile $profile
  */
 class User extends ActiveRecord implements IdentityInterface
 {
-    /** @var string Plain password. Used for model validation. */
+    use ModuleTrait;
+    use ContainerTrait;
+
+    /**
+     * @var string default user name regular expression.
+     */
+    public $usernameRegex = '/^[-a-zA-Z0-9_\.@]+$/';
+    /**
+     * @var string Plain password. Used for model validation.
+     */
     public $password;
 
+    /**
+     * @inheritdoc
+     */
+    public function behaviors()
+    {
+        return [
+            TimestampBehavior::className(),
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function attributeLabels()
+    {
+        return [
+            'username' => Yii::t('user', 'Username'),
+            'email' => Yii::t('user', 'Email'),
+            'registration_ip' => Yii::t('user', 'Registration ip'),
+            'unconfirmed_email' => Yii::t('user', 'New email'),
+            'password' => Yii::t('user', 'Password'),
+            'created_at' => Yii::t('user', 'Registration time'),
+            'confirmed_at' => Yii::t('user', 'Confirmation time'),
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function scenarios()
+    {
+        return ArrayHelper::merge(
+            parent::scenarios(),
+            [
+                'register' => ['username', 'email', 'password'],
+                'connect' => ['username', 'email'],
+                'create' => ['username', 'email', 'password'],
+                'update' => ['username', 'email', 'password'],
+                'settings' => ['username', 'email', 'password'],
+            ]
+        );
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function rules()
+    {
+        return [
+            // username rules
+            'usernameRequired' => ['username', 'required', 'on' => ['register', 'create', 'connect', 'update']],
+            'usernameMatch' => ['username', 'match', 'pattern' => $this->usernameRegex],
+            'usernameLength' => ['username', 'string', 'min' => 3, 'max' => 255],
+            'usernameTrim' => ['username', 'trim'],
+            'usernameUnique' => [
+                'username',
+                'unique',
+                'message' => Yii::t('user', 'This username has already been taken')
+            ],
+
+            // email rules
+            'emailRequired' => ['email', 'required', 'on' => ['register', 'connect', 'create', 'update']],
+            'emailPattern' => ['email', 'email'],
+            'emailLength' => ['email', 'string', 'max' => 255],
+            'emailUnique' => [
+                'email',
+                'unique',
+                'message' => Yii::t('user', 'This email address has already been taken')
+            ],
+            'emailTrim' => ['email', 'trim'],
+
+            // password rules
+            'passwordRequired' => ['password', 'required', 'on' => ['register']],
+            'passwordLength' => ['password', 'string', 'min' => 6, 'max' => 72, 'on' => ['register', 'create']],
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function validateAuthKey($authKey)
+    {
+        return $this->getAttribute('auth_key') === $authKey;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getId()
+    {
+        return $this->getAttribute('id');
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getAuthKey()
+    {
+        return $this->getAttribute('auth_key');
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public static function findIdentity($id)
+    {
+        return static::findOne($id);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public static function findIdentityByAccessToken($token, $type = null)
+    {
+        throw new NotSupportedException('Method "' . __CLASS__ . '::' . __METHOD__ . '" is not implemented.');
+    }
+
     /**
      * @return bool whether is blocked or not.
      */
@@ -41,13 +173,50 @@ class User extends ActiveRecord implements IdentityInterface
         return $this->blocked_at !== null;
     }
 
+    /**
+     * @return bool whether the user is an admin or not
+     */
     public function getIsAdmin()
     {
-
+        return $this->getAuthHelper()->isAdmin($this->username);
     }
 
+    /**
+     * Checks whether a user has a specific role
+     *
+     * @param string $role
+     *
+     * @return bool
+     */
     public function hasRole($role)
     {
+        return $this->getAuthHelper()->hasRole($this->id, $role);
+    }
 
+    /**
+     * @return \yii\db\ActiveQuery
+     */
+    public function getProfile()
+    {
+        return $this->hasOne($this->getClassMapHelper()->get('Profile'), ['user_id' => 'id']);
+    }
+
+    protected $connectedAccounts;
+
+    /**
+     * @return SocialNetworkAccount[] social connected accounts [ 'providerName' => socialAccountModel ]
+     */
+    public function getSocialNetworkAccounts()
+    {
+        if ($this->connectedAccounts == null) {
+            $accounts = $this->connectedAccounts = $this
+                ->hasMany($this->getClassMapHelper()->get('Account'), ['user_id' => 'id'])
+                ->all();
+
+            foreach($accounts as $account) {
+                $this->connectedAccounts[$account->provider] = $account;
+            }
+        }
+        return $this->connectedAccounts;
     }
 }
diff --git a/lib/User/Module.php b/lib/User/Module.php
index d78c5ef..fe5cb0f 100644
--- a/lib/User/Module.php
+++ b/lib/User/Module.php
@@ -10,6 +10,10 @@ class Module extends \yii\base\Module
      * @var bool whether to allow registration process or not.
      */
     public $allowRegistration = true;
+    /**
+     * @var bool whether to generate passwords automatically and remove the password field from the registration form.
+     */
+    public $generatePasswords = false;
     /**
      * @var bool whether to force email confirmation to.
      */
@@ -18,6 +22,10 @@ class Module extends \yii\base\Module
      * @var bool whether to allow login accounts with unconfirmed emails.
      */
     public $allowUnconfirmedEmailLogin = false;
+    /**
+     * @var bool whether to enable password recovery or not.
+     */
+    public $allowPasswordRecovery = true;
     /**
      * @var string the class name of the strategy class to handle user's email change.
      */
diff --git a/lib/User/Service/MailService.php b/lib/User/Service/MailService.php
new file mode 100644
index 0000000..f561f84
--- /dev/null
+++ b/lib/User/Service/MailService.php
@@ -0,0 +1,12 @@
+<?php
+namespace Da\User\Service;
+
+use Da\User\Contracts\ServiceInterface;
+
+class MailService implements ServiceInterface
+{
+    public function run()
+    {
+        // TODO: Implement run() method.
+    }
+}
diff --git a/lib/User/Service/UserCreateService.php b/lib/User/Service/UserCreateService.php
new file mode 100644
index 0000000..7256a99
--- /dev/null
+++ b/lib/User/Service/UserCreateService.php
@@ -0,0 +1,73 @@
+<?php
+namespace Da\User\Service;
+
+use Da\User\Contracts\ServiceInterface;
+use Da\User\Helper\SecurityHelper;
+use Da\User\Model\User;
+use yii\base\InvalidCallException;
+use Exception;
+use yii\log\Logger;
+
+/**
+ *
+ * UserCreateService.php
+ *
+ * Date: 4/12/16
+ * Time: 2:55
+ * @author Antonio Ramirez <hola@2amigos.us>
+ */
+class UserCreateService implements ServiceInterface
+{
+    protected $model;
+    protected $securityHelper;
+    protected $logger;
+
+    public function __construct(User $model, SecurityHelper $securityHelper, Logger $logger)
+    {
+        $this->model = $model;
+        $this->securityHelper = $securityHelper;
+        $this->logger = $logger;
+    }
+
+    /**
+     * @return bool
+     */
+    public function run()
+    {
+        $model = $this->model;
+
+        if ($model->getIsNewRecord() === false) {
+            throw new InvalidCallException('Cannot create a new user from an existing one.');
+        }
+
+        $transaction = $model->getDb()->beginTransaction();
+
+        try {
+            $model->confirmed_at = time();
+            $model->password = $model->password !== null
+                ? $model->password
+                : $this->securityHelper->generatePassword(8);
+
+            // TODO: Trigger BEFORE CREATE EVENT
+
+            if (!$model->save()) {
+                $transaction->rollBack();
+
+                return false;
+            }
+
+            // TODO: Send welcome message
+
+            $transaction->commit();
+
+            return true;
+
+        } catch (Exception $e) {
+            $transaction->rollBack();
+            $this->logger->log($e->getMessage(), Logger::LEVEL_WARNING);
+
+            return false;
+        }
+    }
+
+}
diff --git a/lib/User/Traits/ContainerTrait.php b/lib/User/Traits/ContainerTrait.php
new file mode 100644
index 0000000..5d3e156
--- /dev/null
+++ b/lib/User/Traits/ContainerTrait.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Da\User\Traits;
+
+use Yii;
+use yii\di\Container;
+
+/**
+ * @property-read Container $di
+ * @property-ready Da\User\Helper\AuthHelper $authHelper
+ */
+trait ContainerTrait
+{
+    /**
+     * @return Container
+     */
+    public function getDi()
+    {
+        return Yii::$container;
+    }
+
+    /**
+     * @return \Da\User\Helper\AuthHelper
+     */
+    public function getAuthHelper()
+    {
+        return Yii::$container->get('Da\User\Helper\AuthHelper');
+    }
+
+    /**
+     * @return \Da\User\Helper\ClassMapHelper
+     */
+    public function getClassMapHelper()
+    {
+        return Yii::$container->get('Da\User\Helper\ClassMapHelper');
+    }
+
+}
diff --git a/lib/User/Traits/ModuleTrait.php b/lib/User/Traits/ModuleTrait.php
new file mode 100644
index 0000000..05d3385
--- /dev/null
+++ b/lib/User/Traits/ModuleTrait.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Da\User\Traits;
+
+use Da\User\Helper\AuthHelper;
+use Da\User\Module;
+use Yii;
+
+/**
+ * @property-read Module $module
+ */
+trait ModuleTrait
+{
+    /**
+     * @return \Da\User\Module
+     */
+    public function getModule()
+    {
+        return Yii::$app->getModule('user');
+    }
+}