invoiceninja/app/Models/AccountGatewaySettings.php

<?php namespace App\Models;

use Auth;

/**
 * Class AccountGatewaySettings
 */
class AccountGatewaySettings extends EntityModel
{
    /**
     * @var array
     */
    protected $dates = ['updated_at'];

    /**
     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function gatewayType()
    {
        return $this->belongsTo('App\Models\GatewayType');
    }

    /**
     * @param null $context
     * @return mixed
     */
    public static function createNew($context = null)
    {
        $className = get_called_class();
        $entity = new $className();

        if ($context) {
            $user = $context instanceof User ? $context : $context->user;
            $account = $context->account;
        } elseif (Auth::check()) {
            $user = Auth::user();
            $account = Auth::user()->account;
        } else {
            Utils::fatalError();
        }

        $entity->user_id = $user->id;
        $entity->account_id = $account->id;

        // store references to the original user/account to prevent needing to reload them
        $entity->setRelation('user', $user);
        $entity->setRelation('account', $account);

        if (method_exists($className, 'trashed')){
            $lastEntity = $className::whereAccountId($entity->account_id)->withTrashed();
        } else {
            $lastEntity = $className::whereAccountId($entity->account_id);
        }

        return $entity;
    }

    public function setCreatedAtAttribute($value)
    {
        // to Disable created_at
    }
}