Generation of Mini Program QR Code

1. Want to see the channel through which users follow Mini Program, so I want to add parameters to the generation of Mini Program QR code. I want to generate the relevant QR code myself, using POST https://api.weixin.qq.com/wxa... but reporting an error

all the time. 
var postOptions = {
    url: "https://api.weixin.qq.com/wxa/getwxacodeunlimit?" + post_con,
    method: "POST"
  }
  request.post(postOptions, function (err, response, body) {
    //  console.log(err, response);
    console.log("response", response.body);
  })

the error message is {"errcode": 44002, "errmsg": "empty post data hint: [6SRJrA09672756]"}
Javascript Mini-Program
Apr.03,2022

wx.request Post pass parameters using data: {}

I've implemented it. Take a look at SDK

.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e9ec6a-1a01.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e9ec6a-1a01.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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