yii\authclient\OAuthToken::getParam PHP Method

    public function getParam($name)
    {
        return isset($this->_params[$name]) ? $this->_params[$name] : null;
    }

 public function testSetupParams()
 {
     $oauthToken = new OAuthToken();
     $params = ['name_1' => 'value_1', 'name_2' => 'value_2'];
     $oauthToken->setParams($params);
     $this->assertEquals($params, $oauthToken->getParams(), 'Unable to setup params!');
     $newParamName = 'new_param_name';
     $newParamValue = 'new_param_value';
     $oauthToken->setParam($newParamName, $newParamValue);
     $this->assertEquals($newParamValue, $oauthToken->getParam($newParamName), 'Unable to setup param by name!');
 }