diff --git a/README.md b/README.md
index 131b52d..7931a21 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,4 @@
+adding multiple login to auth token library
 # Laravel 4 Auth token
 
 Hooks into the laravel auth module and provides an auth token upon success. This token is really only secure in https environment. This main purpose for this module was to provide an auth token to javascript web app which could be used to identify users on api calls.
diff --git a/src/Tappleby/AuthToken/AuthTokenDriver.php b/src/Tappleby/AuthToken/AuthTokenDriver.php
index 40fc922..f3f3e31 100644
--- a/src/Tappleby/AuthToken/AuthTokenDriver.php
+++ b/src/Tappleby/AuthToken/AuthTokenDriver.php
@@ -72,11 +72,11 @@ public function validate($authTokenPayload) {
    * @param array $credentials
    * @return bool|AuthToken
    */
-  public function attempt(array $credentials) {
+  public function attempt(array $credentials,$deviceIdentifier=null) {
     $user = $this->users->retrieveByCredentials($credentials);
 
     if($user instanceof UserInterface && $this->users->validateCredentials($user, $credentials)) {
-       return $this->create($user);
+       return $this->create($user,$deviceIdentifier);
     }
 
     return false;
@@ -88,9 +88,9 @@ public function attempt(array $credentials) {
    * @param UserInterface $user
    * @return bool|AuthToken
    */
-  public function create(UserInterface $user) {
-    $this->tokens->purge($user);
-    return $this->tokens->create($user);
+  public function create(UserInterface $user,$deviceIdentifier=null) {
+    $this->tokens->purge($user,$deviceIdentifier);
+    return $this->tokens->create($user,$deviceIdentifier);
   }
 
   /**
@@ -112,4 +112,7 @@ public function user(AuthToken $token) {
   public function publicToken(AuthToken $token) {
     return $this->tokens->serializeToken($token);
   }
+  function load($user){
+
+  }
 }
\ No newline at end of file
diff --git a/src/Tappleby/AuthToken/AuthTokenProviderInterface.php b/src/Tappleby/AuthToken/AuthTokenProviderInterface.php
index e4f42df..b914ecb 100644
--- a/src/Tappleby/AuthToken/AuthTokenProviderInterface.php
+++ b/src/Tappleby/AuthToken/AuthTokenProviderInterface.php
@@ -25,7 +25,7 @@ interface AuthTokenProviderInterface {
    * @param \Illuminate\Auth\UserInterface $user
    * @return \TAppleby\AuthToken\AuthToken|false
    */
-  public function create(UserInterface $user);
+  public function create(UserInterface $user,$deviceIdentifier=null);
 
 
   /**
diff --git a/src/Tappleby/AuthToken/AuthTokenServiceProvider.php b/src/Tappleby/AuthToken/AuthTokenServiceProvider.php
index b3e645a..5c3b5c4 100644
--- a/src/Tappleby/AuthToken/AuthTokenServiceProvider.php
+++ b/src/Tappleby/AuthToken/AuthTokenServiceProvider.php
@@ -1,61 +1,61 @@
-<?php namespace Tappleby\AuthToken;
-
-use Illuminate\Support\ServiceProvider;
-
-class AuthTokenServiceProvider extends ServiceProvider
-{
-
-	/**
-	 * Indicates if loading of the provider is deferred.
-	 *
-	 * @var bool
-	 */
-	protected $defer = false;
-
-	public function boot()
-	{
-		$this->package('tappleby/laravel-auth-token');
-		$this->app['router']->filter('auth.token', 'tappleby.auth.token.filter');
-	}
-
-
-	/**
-	 * Register the service provider.
-	 *
-	 * @return void
-	 */
-	public function register()
-	{
-		$app = $this->app;
-
-		$app->bindShared('tappleby.auth.token', function ($app) {
-			return new AuthTokenManager($app);
-		});
-
-		$app->bindShared('tappleby.auth.token.filter', function ($app) {
-			$driver = $app['tappleby.auth.token']->driver();
-      $events = $app['events'];
-
-      return new AuthTokenFilter($driver, $events);
-		});
-
-		$app->bind('Tappleby\AuthToken\AuthTokenController', function ($app) {
-			$driver = $app['tappleby.auth.token']->driver();
-			$credsFormatter = $app['config']->get('laravel-auth-token::format_credentials', null);
-			$events = $app['events'];
-
-      return new AuthTokenController($driver, $credsFormatter, $events);
-		});
-	}
-
-	/**
-	 * Get the services provided by the provider.
-	 *
-	 * @return array
-	 */
-	public function provides()
-	{
-		return array('tappleby.auth.token', 'tappleby.auth.token.filter');
-	}
-
+<?php namespace Tappleby\AuthToken;
+
+use Illuminate\Support\ServiceProvider;
+
+class AuthTokenServiceProvider extends ServiceProvider
+{
+
+	/**
+	 * Indicates if loading of the provider is deferred.
+	 *
+	 * @var bool
+	 */
+	protected $defer = false;
+
+	public function boot()
+	{
+		$this->package('tappleby/laravel-auth-token');
+		$this->app['router']->filter('auth.token', 'tappleby.auth.token.filter');
+	}
+
+
+	/**
+	 * Register the service provider.
+	 *
+	 * @return void
+	 */
+	public function register()
+	{
+		$app = $this->app;
+
+		$app->bindShared('tappleby.auth.token', function ($app) {
+			return new AuthTokenManager($app);
+		});
+
+		$app->bindShared('tappleby.auth.token.filter', function ($app) {
+			$driver = $app['tappleby.auth.token']->driver();
+      $events = $app['events'];
+
+      return new AuthTokenFilter($driver, $events);
+		});
+
+		$app->bind('Tappleby\AuthToken\AuthTokenController', function ($app) {
+			$driver = $app['tappleby.auth.token']->driver();
+			$credsFormatter = $app['config']->get('laravel-auth-token::format_credentials', null);
+			$events = $app['events'];
+
+      return new AuthTokenController($driver, $credsFormatter, $events);
+		});
+	}
+
+	/**
+	 * Get the services provided by the provider.
+	 *
+	 * @return array
+	 */
+	public function provides()
+	{
+		return array('tappleby.auth.token', 'tappleby.auth.token.filter');
+	}
+
 }
\ No newline at end of file
diff --git a/src/Tappleby/AuthToken/DatabaseAuthTokenProvider.php b/src/Tappleby/AuthToken/DatabaseAuthTokenProvider.php
index 746bc72..ab3c195 100644
--- a/src/Tappleby/AuthToken/DatabaseAuthTokenProvider.php
+++ b/src/Tappleby/AuthToken/DatabaseAuthTokenProvider.php
@@ -54,7 +54,7 @@ protected function db() {
    * @param \Illuminate\Auth\UserInterface $user
    * @return \TAppleby\AuthToken\AuthToken|false
    */
-  public function create(UserInterface $user)
+  public function create(UserInterface $user,$deviceIdentifier=null)
   {
     if($user == null || $user->getAuthIdentifier() == null) {
       return false;
@@ -65,7 +65,7 @@ public function create(UserInterface $user)
 
     $t = new \DateTime;
     $insertData = array_merge($token->toArray(), array(
-       'created_at' => $t, 'updated_at' => $t
+       'created_at' => $t, 'updated_at' => $t,'device_identifier'=>$deviceIdentifier
     ));
 
     $this->db()->insert($insertData);
@@ -108,13 +108,15 @@ public function find($serializedAuthToken)
    * @param mixed|\Illuminate\Auth\UserInterface $identifier
    * @return bool
    */
-  public function purge($identifier)
+  public function purge($identifier,$deviceIdentifier=null)
   {
     if($identifier instanceof UserInterface) {
       $identifier = $identifier->getAuthIdentifier();
     }
 
-    $res = $this->db()->where('auth_identifier', $identifier)->delete();
+      $query = $this->db()->where('auth_identifier', $identifier);
+      $query=$query->where('device_identifier',$deviceIdentifier);
+      $res = $query->delete();
 
     return $res > 0;
   }
diff --git a/src/migrations/2015_06_01_120729_add_device_identifier_field_to_auth_token.php b/src/migrations/2015_06_01_120729_add_device_identifier_field_to_auth_token.php
new file mode 100644
index 0000000..87a3cba
--- /dev/null
+++ b/src/migrations/2015_06_01_120729_add_device_identifier_field_to_auth_token.php
@@ -0,0 +1,31 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddDeviceIdentifierFieldToAuthToken extends Migration {
+
+	/**
+	 * Run the migrations.
+	 *
+	 * @return void
+	 */
+	public function up()
+	{
+		Schema::table('ta_auth_tokens', function($table)
+		{
+			$table->string('device_identifier')->nullable();
+		});
+	}
+
+	/**
+	 * Reverse the migrations.
+	 *
+	 * @return void
+	 */
+	public function down()
+	{
+		//
+	}
+
+}
diff --git a/tests/TAppleby/AuthToken/AuthTokenDriverTest.php b/tests/TAppleby/AuthToken/AuthTokenDriverTest.php
index 2594b23..1b7df47 100644
--- a/tests/TAppleby/AuthToken/AuthTokenDriverTest.php
+++ b/tests/TAppleby/AuthToken/AuthTokenDriverTest.php
@@ -19,6 +19,7 @@ public function setUp() {
   }
 
   public function testValidateReturnsFalseNullToken() {
+
     $tokens = m::mock('Tappleby\AuthToken\AuthTokenProviderInterface');
     $users = m::mock('Illuminate\Auth\UserProviderInterface');
 
@@ -41,11 +42,11 @@ public function testValidateReturnsFalseInvalidToken() {
 
   public function testFilterReturnsFalseValidTokenMissingUser() {
     $tokens = m::mock('Tappleby\AuthToken\AuthTokenProviderInterface');
+
     $users = m::mock('Illuminate\Auth\UserProviderInterface');
 
     $tokens->shouldReceive('find')->once()->andReturn( new \Tappleby\AuthToken\AuthToken(1, 'public', 'private') );
-    $users->shouldReceive('retrieveByID')->once()->andReturnNull();
-
+    $users->shouldReceive('retrieveById')->once()->andReturnNull();
     $driver = new \Tappleby\AuthToken\AuthTokenDriver($tokens, $users);
 
     $this->assertFalse( $driver->validate('good_token') );
@@ -58,7 +59,7 @@ public function testValidateReturnsUsers() {
     $tokens->shouldReceive('find')->once()->andReturn( new \Tappleby\AuthToken\AuthToken(1, 'public', 'private') );
 
     $user = m::mock('StdClass');
-    $users->shouldReceive('retrieveByID')->once()->andReturn( $user );
+    $users->shouldReceive('retrieveById')->once()->andReturn( $user );
 
 
     $driver = new \Tappleby\AuthToken\AuthTokenDriver($tokens, $users);
@@ -73,7 +74,7 @@ public function testUserFromAuthToken() {
     $authToken = m::mock('Tappleby\AuthToken\AuthToken');
 
     $user = m::mock('StdClass');
-    $users->shouldReceive('retrieveByID')->once()->andReturn( $user );
+    $users->shouldReceive('retrieveById')->once()->andReturn( $user );
     $authToken->shouldReceive('getAuthIdentifier')->once()->andReturn(1);
 
     $driver = new \Tappleby\AuthToken\AuthTokenDriver($tokens, $users);
diff --git a/tests/TAppleby/AuthToken/DatabaseAuthTokenProviderTest.php b/tests/TAppleby/AuthToken/DatabaseAuthTokenProviderTest.php
index dceea16..806375a 100644
--- a/tests/TAppleby/AuthToken/DatabaseAuthTokenProviderTest.php
+++ b/tests/TAppleby/AuthToken/DatabaseAuthTokenProviderTest.php
@@ -165,10 +165,11 @@ public function testPurgeGetsIdentifierFromUser() {
     $provider = $this->getProvider( $enc );
 
     $provider->getConnection()->shouldReceive('table')->once()->with('table')->andReturn($query = m::mock('StdClass'));
-    $query->shouldReceive('where')->once()->with('auth_identifier', 1)->andReturn($query);
+    $query->shouldReceive('where')->once()->ordered()->withArgs(['auth_identifier', 1])->andReturn($query);
+    $query->shouldReceive('where')->once()->ordered()->withArgs(['device_identifier', 'android 1'])->andReturn($query);
     $query->shouldReceive('delete')->once()->andReturn(0);
 
-    $provider->purge( $user );
+    $provider->purge( $user,'android 1' );
   }
 
   public function testPurgeReturnsFalseWhenNoTokensDeleted() {
@@ -176,10 +177,11 @@ public function testPurgeReturnsFalseWhenNoTokensDeleted() {
     $provider = $this->getProvider( $enc );
 
     $provider->getConnection()->shouldReceive('table')->once()->with('table')->andReturn($query = m::mock('StdClass'));
-    $query->shouldReceive('where')->once()->with('auth_identifier', 1)->andReturn($query);
+    $query->shouldReceive('where')->once()->ordered()->withArgs(['auth_identifier', 1])->andReturn($query);
+    $query->shouldReceive('where')->once()->ordered()->withArgs(['device_identifier', 'android 1'])->andReturn($query);
     $query->shouldReceive('delete')->once()->andReturn(0);
 
-    $this->assertFalse( $provider->purge(1) );
+    $this->assertFalse( $provider->purge(1,'android 1') );
   }
 
   public function testPurgeReturnsTrueWhenTokensDeleted() {
@@ -187,9 +189,10 @@ public function testPurgeReturnsTrueWhenTokensDeleted() {
     $provider = $this->getProvider( $enc );
 
     $provider->getConnection()->shouldReceive('table')->once()->with('table')->andReturn($query = m::mock('StdClass'));
-    $query->shouldReceive('where')->once()->with('auth_identifier', 1)->andReturn($query);
+    $query->shouldReceive('where')->once()->ordered()->withArgs(['auth_identifier', 1])->andReturn($query);
+    $query->shouldReceive('where')->once()->ordered()->withArgs(['device_identifier', 'android 1'])->andReturn($query);
     $query->shouldReceive('delete')->once()->andReturn(5);
 
-    $this->assertTrue( $provider->purge(1) );
+    $this->assertTrue( $provider->purge(1,'android 1') );
   }
 }
\ No newline at end of file