diff --git a/src/League/OAuth2/Server/Authorization.php b/src/League/OAuth2/Server/Authorization.php
index a4b91d10..3f3342b0 100644
--- a/src/League/OAuth2/Server/Authorization.php
+++ b/src/League/OAuth2/Server/Authorization.php
@@ -476,18 +476,18 @@ class Authorization
     public function getStorage($obj)
     {
         if (!isset($this->storages[$obj])) {
-            throw new ServerException('The `'.$obj.'` storage interface has not been registered with the authorization
-                server');
+            throw new ServerException(
+                'The `'.$obj.'` storage interface has not been registered with the authorization server'
+            );
         }
         return $this->storages[$obj];
     }
 
     /**
      * Issue an access token
-     * @param  array $inputParams Optional array of parsed $_POST keys
      * @return array Authorise request parameters
      */
-    public function issueAccessToken($inputParams = [])
+    public function issueAccessToken()
     {
         $grantType = $this->getRequest()->request->get('grant_type');
         if (is_null($grantType)) {
@@ -500,7 +500,7 @@ class Authorization
         }
 
         // Complete the flow
-        return $this->getGrantType($grantType)->completeFlow($inputParams);
+        return $this->getGrantType($grantType)->completeFlow();
     }
 
     /**
diff --git a/src/League/OAuth2/Server/Entities/AbstractToken.php b/src/League/OAuth2/Server/Entities/AbstractToken.php
index c5b5b391..ddc31140 100644
--- a/src/League/OAuth2/Server/Entities/AbstractToken.php
+++ b/src/League/OAuth2/Server/Entities/AbstractToken.php
@@ -14,8 +14,8 @@ namespace League\OAuth2\Server\Entities;
 use League\OAuth2\Server\Storage\SessionStorageInterface;
 use League\OAuth2\Server\Util\SecureKey;
 use League\OAuth2\Server\Exception\ServerException;
-use \League\OAuth2\Server\Authorization;
-use \League\OAuth2\Server\Resource;
+use League\OAuth2\Server\Authorization;
+use League\OAuth2\Server\Resource;
 use Symfony\Component\HttpFoundation\ParameterBag;
 
 /**
@@ -29,12 +29,6 @@ abstract class AbstractToken
      */
     protected $token;
 
-    /**
-     * Session ID
-     * @var string
-     */
-    protected $sessionId;
-
     /**
      * Associated session
      * @var \League\OAuth2\Server\Session
@@ -71,7 +65,6 @@ abstract class AbstractToken
         }
 
         $this->server = $server;
-        $this->scopes = new ParameterBag();
         return $this;
     }
 
@@ -96,11 +89,8 @@ abstract class AbstractToken
             return $this->session;
         }
 
-        if ($this->sessionId !== null) {
-            $session = $this->server->getStorage('session')->getSession($this->sessionId);
-        }
-
-        throw new ServerException('No session ID set for this token');
+        $this->session = $this->server->getStorage('session')->getByAccessToken($this->token);
+        return $this->session;
     }
 
     /**
@@ -148,10 +138,10 @@ abstract class AbstractToken
      * @param \League\OAuth2\Server\Entities\Scope $scope
      * @return self
      */
-    public function associateScope($scope)
+    public function associateScope(Scope $scope)
     {
-        if (!$this->scopes->has($scope->getId())) {
-            $this->scopes->set($scope->getId(), $scope);
+        if (!isset($this->scopes[$scope->getId()])) {
+            $this->scopes[$scope->getId()] = $scope;
         }
 
         return $this;
@@ -164,18 +154,44 @@ abstract class AbstractToken
      */
     public function hasScope($scope)
     {
-        return $this->scopes->has($scope);
+        if ($this->scopes === null) {
+            $this->getScopes();
+        }
+
+        return isset($this->scopes[$scope]);
     }
 
     /**
-     * Return all associated scopes
-     * @return ParameterBag
+     * Return all scopes associated with the session
+     * @return array Array of \League\OAuth2\Server\Entities\Scope
      */
     public function getScopes()
     {
+        if ($this->scopes === null) {
+            $this->scopes = $this->formatScopes(
+                $this->server->getStorage('access_token')->getScopes($this->getToken())
+            );
+        }
+
         return $this->scopes;
     }
 
+    /**
+     * Format the local scopes array
+     * @param  array $unformated Array of Array of \League\OAuth2\Server\Entities\Scope
+     * @return array
+     */
+    private function formatScopes($unformated = [])
+    {
+        $scopes = [];
+        foreach ($unformated as $scope) {
+            if ($scope instanceof Scope) {
+                $scopes[$scope->getId()] = $scope;
+            }
+        }
+        return $scopes;
+    }
+
     /**
      * Expire the token
      * @return void
diff --git a/src/League/OAuth2/Server/Entities/AccessToken.php b/src/League/OAuth2/Server/Entities/AccessToken.php
index 5c48c2d4..57805674 100644
--- a/src/League/OAuth2/Server/Entities/AccessToken.php
+++ b/src/League/OAuth2/Server/Entities/AccessToken.php
@@ -27,7 +27,7 @@ class AccessToken extends AbstractToken
      */
     public function save()
     {
-        $this->server->getStorage('access_token')->createAccessToken(
+        $this->server->getStorage('access_token')->create(
             $this->getToken(),
             $this->getExpireTime(),
             $this->getSession()->getId()
@@ -40,4 +40,12 @@ class AccessToken extends AbstractToken
 
         return $this;
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function expire()
+    {
+        $this->server->getStorage('access_token')->delete($this->getToken());
+    }
 }
diff --git a/src/League/OAuth2/Server/Entities/RefreshToken.php b/src/League/OAuth2/Server/Entities/RefreshToken.php
index 8be3fc43..7d91f0ad 100644
--- a/src/League/OAuth2/Server/Entities/RefreshToken.php
+++ b/src/League/OAuth2/Server/Entities/RefreshToken.php
@@ -45,6 +45,9 @@ class RefreshToken extends AbstractToken
      */
     public function getAccessToken()
     {
+        if (! $this->accessToken instanceof AccessToken) {
+            $this->accessToken = $this->server->getStorage('access_token')->getByRefreshToken($this->getToken());
+        }
         return $this->accessToken;
     }
 
@@ -53,7 +56,7 @@ class RefreshToken extends AbstractToken
      */
     public function save()
     {
-        $this->server->getStorage('refresh_token')->createAccessToken(
+        $this->server->getStorage('refresh_token')->create(
             $this->getToken(),
             $this->getExpireTime(),
             $this->getAccessToken()->getToken()
@@ -64,4 +67,12 @@ class RefreshToken extends AbstractToken
             $this->server->getStorage('refresh_token')->associateScope($this->getToken(), $scope->getId());
         }
     }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function expire()
+    {
+        $this->server->getStorage('refresh_token')->delete($this->getToken());
+    }
 }
diff --git a/src/League/OAuth2/Server/Entities/Scope.php b/src/League/OAuth2/Server/Entities/Scope.php
index 8d6ec4bd..3e52d203 100644
--- a/src/League/OAuth2/Server/Entities/Scope.php
+++ b/src/League/OAuth2/Server/Entities/Scope.php
@@ -11,6 +11,10 @@
 
 namespace League\OAuth2\Server\Entities;
 
+use League\OAuth2\Server\Exception\ServerException;
+use League\OAuth2\Server\Authorization;
+use League\OAuth2\Server\Resource;
+
 /**
  * Scope entity class
  */
diff --git a/src/League/OAuth2/Server/Entities/Session.php b/src/League/OAuth2/Server/Entities/Session.php
index 050f4c5e..8c1b0d72 100644
--- a/src/League/OAuth2/Server/Entities/Session.php
+++ b/src/League/OAuth2/Server/Entities/Session.php
@@ -88,7 +88,7 @@ class Session
             throw new ServerException('No instance of Authorization or Resource server injected');
         }
 
-        $this->scopes = new ParameterBag();
+        $this->server = $server;
         return $this;
     }
 
@@ -117,10 +117,10 @@ class Session
      * @param \League\OAuth2\Server\Entities\Scope $scope
      * @return self
      */
-    public function associateScope($scope)
+    public function associateScope(Scope $scope)
     {
-        if (!$this->scopes->has($scope->getId())) {
-            $this->scopes->set($scope->getId(), $scope);
+        if (!isset($this->scopes[$scope->getId()])) {
+            $this->scopes[$scope->getId()] = $scope;
         }
 
         return $this;
@@ -133,7 +133,11 @@ class Session
      */
     public function hasScope($scope)
     {
-        return $this->scopes->has($scope);
+        if ($this->scopes === null) {
+            $this->getScopes();
+        }
+
+        return isset($this->scopes[$scope]);
     }
 
     /**
@@ -142,7 +146,27 @@ class Session
      */
     public function getScopes()
     {
-        return $this->scopes->all();
+        if ($this->scopes === null) {
+            $this->scopes = $this->formatScopes($this->server->getStorage('session')->getScopes($this->getId()));
+        }
+
+        return $this->scopes;
+    }
+
+    /**
+     * Format the local scopes array
+     * @param  array $unformated Array of Array of \League\OAuth2\Server\Entities\Scope
+     * @return array
+     */
+    private function formatScopes($unformated = [])
+    {
+        $scopes = [];
+        foreach ($unformated as $scope) {
+            if ($scope instanceof Scope) {
+                $scopes[$scope->getId()] = $scope;
+            }
+        }
+        return $scopes;
     }
 
     /**
@@ -237,7 +261,7 @@ class Session
     public function save()
     {
         // Save the session and get an identifier
-        $id = $this->server->getStorage('session')->createSession(
+        $id = $this->server->getStorage('session')->create(
             $this->getOwnerType(),
             $this->getOwnerId(),
             $this->getClient()->getId(),
diff --git a/src/League/OAuth2/Server/Grant/AbstractGrant.php b/src/League/OAuth2/Server/Grant/AbstractGrant.php
index cb27b2ca..c800d53c 100644
--- a/src/League/OAuth2/Server/Grant/AbstractGrant.php
+++ b/src/League/OAuth2/Server/Grant/AbstractGrant.php
@@ -29,25 +29,25 @@ abstract class AbstractGrant implements GrantTypeInterface
      * Response type
      * @var string
      */
-    protected $responseType = null;
+    protected $responseType;
 
     /**
      * Callback to authenticate a user's name and password
      * @var function
      */
-    protected $callback = null;
+    protected $callback;
 
     /**
      * AuthServer instance
      * @var AuthServer
      */
-    protected $server = null;
+    protected $server;
 
     /**
      * Access token expires in override
      * @var int
      */
-    protected $accessTokenTTL = null;
+    protected $accessTokenTTL;
 
     /**
      * Return the identifier
@@ -132,7 +132,7 @@ abstract class AbstractGrant implements GrantTypeInterface
         $scopes = [];
 
         foreach ($scopesList as $scopeItem) {
-            $scope = $this->server->getStorage('scope')->getScope(
+            $scope = $this->server->getStorage('scope')->get(
                 $scopeItem,
                 $this->getIdentifier()
             );
@@ -141,12 +141,28 @@ abstract class AbstractGrant implements GrantTypeInterface
                 throw new ClientException(sprintf($this->server->getExceptionMessage('invalid_scope'), $scopeItem), 4);
             }
 
-            $scopes[] = $scope;
+            $scopes[$scope->getId()] = $scope;
         }
 
         return $scopes;
     }
 
+    /**
+     * Format the local scopes array
+     * @param  array $unformated Array of Array of \League\OAuth2\Server\Entities\Scope
+     * @return array
+     */
+    protected function formatScopes($unformated = [])
+    {
+        $scopes = [];
+        foreach ($unformated as $scope) {
+            if ($scope instanceof Scope) {
+                $scopes[$scope->getId()] = $scope;
+            }
+        }
+        return $scopes;
+    }
+
     /**
      * Complete the grant flow
      *
diff --git a/src/League/OAuth2/Server/Grant/ClientCredentials.php b/src/League/OAuth2/Server/Grant/ClientCredentials.php
index 5e718e1d..8c573fa5 100644
--- a/src/League/OAuth2/Server/Grant/ClientCredentials.php
+++ b/src/League/OAuth2/Server/Grant/ClientCredentials.php
@@ -76,7 +76,7 @@ class ClientCredentials extends AbstractGrant
         }
 
         // Validate client ID and client secret
-        $client = $this->server->getStorage('client')->getClient(
+        $client = $this->server->getStorage('client')->get(
             $clientId,
             $clientSecret,
             null,
@@ -92,12 +92,12 @@ class ClientCredentials extends AbstractGrant
         $scopes = $this->validateScopes($scopeParam);
 
         // Create a new session
-        $session = new Session();
+        $session = new Session($this->server);
         $session->setOwner('client', $client->getId());
         $session->associateClient($client);
 
         // Generate an access token
-        $accessToken = new AccessToken();
+        $accessToken = new AccessToken($this->server);
         $accessToken->setToken(SecureKey::make());
         $accessToken->setExpireTime($this->server->getAccessTokenTTL() + time());
 
diff --git a/src/League/OAuth2/Server/Grant/Password.php b/src/League/OAuth2/Server/Grant/Password.php
index 85231dff..a4842ec1 100644
--- a/src/League/OAuth2/Server/Grant/Password.php
+++ b/src/League/OAuth2/Server/Grant/Password.php
@@ -39,25 +39,19 @@ class Password extends AbstractGrant
      * Response type
      * @var string
      */
-    protected $responseType = null;
+    protected $responseType;
 
     /**
      * Callback to authenticate a user's name and password
      * @var function
      */
-    protected $callback = null;
-
-    /**
-     * AuthServer instance
-     * @var AuthServer
-     */
-    protected $authServer = null;
+    protected $callback;
 
     /**
      * Access token expires in override
      * @var int
      */
-    protected $accessTokenTTL = null;
+    protected $accessTokenTTL;
 
     /**
      * Set the callback to verify a user's username and password
@@ -107,7 +101,7 @@ class Password extends AbstractGrant
         }
 
         // Validate client ID and client secret
-        $client = $this->server->getStorage('client')->getClient(
+        $client = $this->server->getStorage('client')->get(
             $clientId,
             $clientSecret,
             null,
@@ -177,13 +171,13 @@ class Password extends AbstractGrant
         }
 
         // Save everything
-        $session->save($this->server->getStorage('session'));
+        $session->save();
         $accessToken->setSession($session);
-        $accessToken->save($this->server->getStorage('access_token'));
+        $accessToken->save();
 
         if ($this->server->hasGrantType('refresh_token')) {
             $refreshToken->setAccessToken($accessToken);
-            $refreshToken->save($this->server->getStorage('refresh_token'));
+            $refreshToken->save();
         }
 
         return $response;
diff --git a/src/League/OAuth2/Server/Grant/RefreshToken.php b/src/League/OAuth2/Server/Grant/RefreshToken.php
index 067aaa8a..b816f277 100644
--- a/src/League/OAuth2/Server/Grant/RefreshToken.php
+++ b/src/League/OAuth2/Server/Grant/RefreshToken.php
@@ -80,7 +80,7 @@ class RefreshToken extends AbstractGrant
         }
 
         // Validate client ID and client secret
-        $client = $this->server->getStorage('client')->getClient(
+        $client = $this->server->getStorage('client')->get(
             $clientId,
             $clientSecret,
             null,
@@ -100,7 +100,7 @@ class RefreshToken extends AbstractGrant
         }
 
         // Validate refresh token
-        $oldRefreshToken = $this->server->getStorage('refresh_token')->getToken($oldRefreshTokenParam);
+        $oldRefreshToken = $this->server->getStorage('refresh_token')->get($oldRefreshTokenParam);
 
         if (($oldRefreshToken instanceof RT) === false) {
             throw new Exception\ClientException($this->server->getExceptionMessage('invalid_refresh'), 0);
@@ -110,7 +110,7 @@ class RefreshToken extends AbstractGrant
 
         // Get the scopes for the original session
         $session = $oldAccessToken->getSession();
-        $scopes = $session->getScopes();
+        $scopes = $this->formatScopes($session->getScopes());
 
         // Get and validate any requested scopes
         $requestedScopesString = $this->server->getRequest()->request->get('scope', '');
@@ -124,14 +124,19 @@ class RefreshToken extends AbstractGrant
             //  the request doesn't include any new scopes
 
             foreach ($requestedScopes as $requestedScope) {
-                // if ()
+                if (!isset($scopes[$requestedScope->getId()])) {
+                    throw new Exception\ClientException(
+                        sprintf($this->server->getExceptionMessage('invalid_scope'), $requestedScope->getId()),
+                        0
+                    );
+                }
             }
 
             $newScopes = $requestedScopes;
         }
 
         // Generate a new access token and assign it the correct sessions
-        $newAccessToken = new AccessToken();
+        $newAccessToken = new AccessToken($this->server);
         $newAccessToken->setToken(SecureKey::make());
         $newAccessToken->setExpireTime($this->server->getAccessTokenTTL() + time());
         $newAccessToken->setSession($session);
@@ -155,7 +160,7 @@ class RefreshToken extends AbstractGrant
         $oldRefreshToken->expire($this->server->getStorage('refresh_token'));
 
         // Generate a new refresh token
-        $newRefreshToken = new RT();
+        $newRefreshToken = new RT($this->server);
         $newRefreshToken->setToken(SecureKey::make());
         $newRefreshToken->setExpireTime($this->getRefreshTokenTTL() + time());
         $newRefreshToken->setAccessToken($newAccessToken);
diff --git a/src/League/OAuth2/Server/Storage/AccessTokenInterface.php b/src/League/OAuth2/Server/Storage/AccessTokenInterface.php
index 79d2edb9..1e4afdf9 100644
--- a/src/League/OAuth2/Server/Storage/AccessTokenInterface.php
+++ b/src/League/OAuth2/Server/Storage/AccessTokenInterface.php
@@ -21,14 +21,16 @@ interface AccessTokenInterface
      * @param  string $token The access token
      * @return \League\OAuth2\Server\Entities\AccessToken
      */
-    public function getToken($token);
+    public function get($token);
+
+    public function getByRefreshToken($refreshToken);
 
     /**
      * Get the scopes for an access token
      * @param  string $token The access token
      * @return array Array of \League\OAuth2\Server\Entities\Scope
      */
-    public function getTokenScopes($token);
+    public function getScopes($token);
 
     /**
      * Creates a new access token
@@ -37,7 +39,7 @@ interface AccessTokenInterface
      * @param  string|integer $sessionId The session ID
      * @return \League\OAuth2\Server\Entities\AccessToken
      */
-    public function createAccessToken($token, $expireTime, $sessionId);
+    public function create($token, $expireTime, $sessionId);
 
     /**
      * Associate a scope with an acess token
diff --git a/src/League/OAuth2/Server/Storage/AuthCodeInterface.php b/src/League/OAuth2/Server/Storage/AuthCodeInterface.php
index 58add25d..e3d2b876 100644
--- a/src/League/OAuth2/Server/Storage/AuthCodeInterface.php
+++ b/src/League/OAuth2/Server/Storage/AuthCodeInterface.php
@@ -21,5 +21,5 @@ interface AuthCodeInterface
      * @param  string $code
      * @return \League\OAuth2\Server\Entities\AuthCode
      */
-    public function getCode($code);
+    public function get($code);
 }
diff --git a/src/League/OAuth2/Server/Storage/ClientInterface.php b/src/League/OAuth2/Server/Storage/ClientInterface.php
index b21e4194..705e89f9 100644
--- a/src/League/OAuth2/Server/Storage/ClientInterface.php
+++ b/src/League/OAuth2/Server/Storage/ClientInterface.php
@@ -18,34 +18,11 @@ interface ClientInterface
 {
     /**
      * Validate a client
-     *
-     * Example SQL query:
-     *
-     * <code>
-     * # Client ID + redirect URI
-     * SELECT oauth_clients.id, oauth_clients.secret, oauth_endpoints.redirect_uri, oauth_clients.name
-     *  FROM oauth_clients
-     *  LEFT JOIN oauth_client_endpoints ON oauth_client_endpoints.client_id = oauth_clients.id
-     *  WHERE oauth_clients.id = :clientId AND oauth_client_endpoints.redirect_uri = :redirectUri
-     *
-     * # Client ID + client secret
-     * SELECT oauth_clients.id, oauth_clients.secret, oauth_clients.name
-     *  FROM oauth_clients
-     *  WHERE oauth_clients.id = :clientId AND oauth_clients.secret = :clientSecret
-     *
-     * # Client ID + client secret + redirect URI
-     * SELECT oauth_clients.id, oauth_clients.secret, oauth_client_endpoints.redirect_uri, oauth_clients.name
-     *  FROM oauth_clients LEFT JOIN oauth_client_endpoints
-     *  ON oauth_client_endpoints.client_id = oauth_clients.id
-     *  WHERE oauth_clients.id = :clientId AND oauth_clients.secret = :clientSecret AND
-     *  oauth_client_endpoints.redirect_uri = :redirectUri
-     * </code>
-     *
      * @param  string     $clientId     The client's ID
      * @param  string     $clientSecret The client's secret (default = "null")
      * @param  string     $redirectUri  The client's redirect URI (default = "null")
      * @param  string     $grantType    The grant type used in the request (default = "null")
      * @return League\OAuth2\Server\Entities\Client|null
      */
-    public function getClient($clientId, $clientSecret = null, $redirectUri = null, $grantType = null);
+    public function get($clientId, $clientSecret = null, $redirectUri = null, $grantType = null);
 }
diff --git a/src/League/OAuth2/Server/Storage/RefreshTokenInterface.php b/src/League/OAuth2/Server/Storage/RefreshTokenInterface.php
index e77fe37d..eed16f3f 100644
--- a/src/League/OAuth2/Server/Storage/RefreshTokenInterface.php
+++ b/src/League/OAuth2/Server/Storage/RefreshTokenInterface.php
@@ -21,7 +21,7 @@ interface RefreshTokenInterface
      * @param  string $token
      * @return \League\OAuth2\Server\Entities\RefreshToken
      */
-    public function getToken($token);
+    public function get($token);
 
     /**
      * Create a new refresh token_name
@@ -30,7 +30,7 @@ interface RefreshTokenInterface
      * @param  string $accessToken
      * @return \League\OAuth2\Server\Entities\RefreshToken
      */
-    public function createRefreshToken($token, $expireTime, $accessToken);
+    public function create($token, $expireTime, $accessToken);
 
     /**
      * Delete the refresh token
diff --git a/src/League/OAuth2/Server/Storage/ScopeInterface.php b/src/League/OAuth2/Server/Storage/ScopeInterface.php
index a6d8b6ac..26454389 100644
--- a/src/League/OAuth2/Server/Storage/ScopeInterface.php
+++ b/src/League/OAuth2/Server/Storage/ScopeInterface.php
@@ -29,5 +29,5 @@ interface ScopeInterface
      * @param  string     $grantType The grant type used in the request (default = "null")
      * @return bool|array If the scope doesn't exist return false
      */
-    public function getScope($scope, $grantType = null);
+    public function get($scope, $grantType = null);
 }
diff --git a/src/League/OAuth2/Server/Storage/SessionInterface.php b/src/League/OAuth2/Server/Storage/SessionInterface.php
index c5bc767e..1be23ba8 100644
--- a/src/League/OAuth2/Server/Storage/SessionInterface.php
+++ b/src/League/OAuth2/Server/Storage/SessionInterface.php
@@ -17,25 +17,25 @@ namespace League\OAuth2\Server\Storage;
 interface SessionInterface
 {
     /**
-     * Get a session
-     *
-     * @param  int $sessionId
-     * @return array (As described above)
+     * Get a session from it's identifier
+     * @param string $sessionId
+     * @return \League\OAuth2\Server\Entities\Session
      */
-    public function getSession($sessionId);
+    public function get($sessionId);
+
+    /**
+     * Get a session from an access token
+     * @param  string $accessToken The access token
+     * @return \League\OAuth2\Server\Entities\Session
+     */
+    public function getByAccessToken($accessToken);
 
     /**
      * Get a session's scopes
-     *
-     * Response:
-     * <code>
-     *
-     * </code>
-     *
-     * @param  int $sessionId
-     * @return array (As described aboce)
+     * @param  integer $sessionId
+     * @return array Array of \League\OAuth2\Server\Entities\Scope
      */
-    public function getSessionScopes($sessionId);
+    public function getScopes($sessionId);
 
     /**
      * Create a new session
@@ -43,14 +43,14 @@ interface SessionInterface
      * @param  string $ownerId           Session owner's ID
      * @param  string $clientId          Client ID
      * @param  string $clientRedirectUri Client redirect URI (default = null)
-     * @return int    Session ID
+     * @return integer The session's ID
      */
-    public function createSession($ownerType, $ownerId, $clientId, $clientRedirectUri = null);
+    public function create($ownerType, $ownerId, $clientId, $clientRedirectUri = null);
 
     /**
      * Associate a scope with a session
-     * @param  int        $sessionId
-     * @param  int|string $scopeId    The scopes ID might be an integer or string
+     * @param  integer $sessionId
+     * @param  string  $scopeId    The scopes ID might be an integer or string
      * @return void
      */
     public function associateScope($sessionId, $scopeId);