src/Magento/Client/Rest/OauthException.php
public function getOauthProblem()
    {
        parse_str($this->getResponse()->getBody(true), $arr);
        return isset($arr['oauth_problem']) ? $arr['oauth_problem'] : '';
    }
public function getOauthProblem()
    {
        parse_str($this->getResponse()->getBody(true), $arr);
        return isset($arr['oauth_problem']) ? $arr['oauth_problem'] : '';
    }
public function getOauthProblem ( ) { parse_str ( $ this -> getResponse ( ) -> getBody ( true ) , $ arr ) ; return isset ( $ arr [ 'oauth_problem' ] ) ? $ arr [ 'oauth_problem' ] : '' ; }
Returns the Magento problem constant.

@return string
Returns the Magento problem constant .