OAuth2\OAuth2::createAccessToken PHP Method

    public function createAccessToken(IOAuth2Client $client, $data, $scope = null, $access_token_lifetime = null, $issue_refresh_token = true, $refresh_token_lifetime = null)
    {
        $token = array("access_token" => $this->genAccessToken(), "expires_in" => $access_token_lifetime ?: $this->getVariable(self::CONFIG_ACCESS_LIFETIME), "token_type" => $this->getVariable(self::CONFIG_TOKEN_TYPE), "scope" => $scope);
        $this->storage->createAccessToken($token["access_token"], $client, $data, time() + ($access_token_lifetime ?: $this->getVariable(self::CONFIG_ACCESS_LIFETIME)), $scope);
        // Issue a refresh token also, if we support them
        if ($this->storage instanceof IOAuth2RefreshTokens && $issue_refresh_token === true) {
            $token["refresh_token"] = $this->genAccessToken();
            $this->storage->createRefreshToken($token["refresh_token"], $client, $data, time() + ($refresh_token_lifetime ?: $this->getVariable(self::CONFIG_REFRESH_LIFETIME)), $scope);
            // If we've granted a new refresh token, expire the old one
            if (null !== $this->oldRefreshToken) {
                $this->storage->unsetRefreshToken($this->oldRefreshToken);
                $this->oldRefreshToken = null;
            }
        }
        if ($this->storage instanceof IOAuth2GrantCode) {
            if (null !== $this->usedAuthCode) {
                $this->storage->markAuthCodeAsUsed($this->usedAuthCode->getToken());
                $this->usedAuthCode = null;
            }
        }
        return $token;
    }

 public function testUse()
 {
     $client = $this->storage->getClient(1);
     $access_token = $this->oauth2->createAccessToken($client, array());
     $a = $this->oauth2->verifyAccessToken($access_token['access_token']);
     $this->assertInstanceOf('\\ebussola\\oauth\\AccessToken', $a);
 }