src/Core/OAuth/OAuth2/OAuth2LoginHelper.php
public function getClientID(){
        if(isset($this->clientID) && !empty($this->clientID)){
            return (String)$this->clientID;
        }else{
          throw new SdkException("Can't get OAuth 2 Client ID. It is not set.");
        }
    }
public function getClientID(){
        if(isset($this->clientID) && !empty($this->clientID)){
            return (String)$this->clientID;
        }else{
          throw new SdkException("Can't get OAuth 2 Client ID. It is not set.");
        }
    }
Return the Client ID for the App
@return String   The clientID