More docblock fixes

src/AbstractServer.php

@@ -115,7 +115,7 @@ abstract class AbstractServer
     /**
      * Return a storage class
      * @param  string                                                                  $obj The class required
-     * @return Storage\ClientInterface|Storage\ScopeInterface|Storage\SessionInterface
+     * @return Storage\ClientInterface|Storage\ScopeInterface|Storage\SessionInterface|Storage\AccessTokenInterface|Storage\AuthCodeInterface|Storage\RefreshTokenInterface
      */
     public function getStorage($obj)
     {

src/Grant/AuthCodeGrant.php

@@ -159,7 +159,7 @@ class AuthCodeGrant extends AbstractGrant
 
     /**
      * Complete the auth code grant
-     * @return \League\OAuth2\Server\TokenType\TokenTypeInterface
+     * @return array
      */
     public function completeFlow()
     {

src/Grant/ClientCredentialsGrant.php

@@ -49,7 +49,7 @@ class ClientCredentialsGrant extends AbstractGrant
 
     /**
      * Complete the client credentials grant
-     * @return \League\OAuth2\Server\TokenType\TokenTypeInterface
+     * @return array
      */
     public function completeFlow()
     {

src/Grant/GrantTypeInterface.php

@@ -18,7 +18,7 @@ interface GrantTypeInterface
 {
     /**
      * Complete the grant flow
-     * @return \League\OAuth2\Server\TokenType\TokenTypeInterface
+     * @return array
      */
     public function completeFlow();
 }

src/Grant/PasswordGrant.php

@@ -73,7 +73,7 @@ class PasswordGrant extends AbstractGrant
 
     /**
      * Complete the password grant
-     * @return \League\OAuth2\Server\TokenType\TokenTypeInterface
+     * @return array
      */
     public function completeFlow()
     {