错误码

'code:999' => '服务器异常',
'code:1000' => '参数错误',

'code:2000' => '该手机号已被注册',
'code:2001' => '该手机号暂未注册',
'code:2002' => '密码错误',

'code:6000' => 'Token未找到',

'code:3000' => '商品未找到',

'code:4000' => '拼团活动未找到',

'code:5000' => '下单失败',
'code:5001' => '库存不足',
'code:5002' => '重复参团'