protected function getCredentials() {
        if (!$this->_credentials) {
            $this->_credentials = new CredentialList(
                $this->version,
                $this->solution['accountSid'],
                $this->solution['sid']
            );
        }

        return $this->_credentials;
    }
protected function getCredentials() {
        if (!$this->_credentials) {
            $this->_credentials = new CredentialList(
                $this->version,
                $this->solution['accountSid'],
                $this->solution['sid']
            );
        }

        return $this->_credentials;
    }
protected function getCredentials ( ) { if ( ! $ this -> _credentials ) { $ this -> _credentials = new CredentialList ( $ this -> version , $ this -> solution [ 'accountSid' ] , $ this -> solution [ 'sid' ] ) ; } return $ this -> _credentials ; }
Access the credentials

@return \Twilio\Rest\Api\V2010\Account\Sip\CredentialList\CredentialList
Access the credentials