so guys, i have zohocrm integration code in 2.0 version but now i have change the laravel version to 5.2 to 9.0 so now zohocrm is not support 2.0 version so i am update the zohocrm version 3.0 but i dont understand how to update intial code of zohocrm here is my previos version code can you please help me out how to upgdade code

here is code

      public function createAccessToken(){
        $this->clientId = Config::get('constants.ZOHO_CRM_CLIENT_ID');
        $this->clientSecretId = Config::get('constants.ZOHO_CRM_CLIENT_SECRET_ID');
        $this->redirectUri = Config::get('constants.ZOHO_CRM_REDIRECT_URI');
        $this->currentUserEmail = Config::get('constants.ZOHO_CRM_USER_EMAIL');
        $this->tokenPersistancePath = public_path('zcrm_oauthtokens');
    
        $configuration = [
                "client_id" => $this->clientId ,
                "client_secret"=>$this->clientSecretId,
                "redirect_uri"=>$this->redirectUri,
                "currentUserEmail"=>$this->currentUserEmail,
                'token_persistence_path' =>  $this->tokenPersistancePath,
                'sandbox' => false,
                'apiBaseUrl' => 'www.zohoapis.com'
        ];
        $result = false;
        try {
    
            ZCRMRestClient::initialize($configuration);
    
            $oAuthClient = ZohoOAuth::getClientInstance();
            $refreshToken = "xxx-a0";
            $userIdentifier = $this->currentUserEmail;

            $oAuthTokens = $oAuthClient->generateAccessTokenFromRefreshToken($refreshToken,$userIdentifier);
            $result = true;
            return $oAuthTokens->getAccessToken();
        } catch (Exception $ex) {
            $result = false;
        }
        return $result; 
    }

error comes in like Class “zcrmsdkcrmsetuprestclientZCRMRestClient” not found