i want to add Json output data to my SQL database Users option but not adding

i want to add the json output data to the data of customer account creation, i use this code but it only account creation apply to my SQL database but the Json output from my endpoint url does not added to the database

please any solution?

i use this code below

     //execute the started curl session
     $output = curl_exec($ch);
     //var_dumb($output);
     $err = curl_error($ch);
     if ($err){
          exist("Error Encountered ".$err);
     }

     $jsonoutput = json_decode($output);
     //close the session and delete the variable made by curl_init
     curl_close($ch);
     
     if($jsonoutput->status = 1){
        $customer_code = $jsonoutput->data->customer_code;
        
        
        $sql = "insert into #__n(customer_code)values('$customer_code')";
    if($data->var_dump($sql)){
    
        echo "Account successfully Created". $customer_code;
        }else{
           echo $data->dberror();
     }