Translation Notice
This article was machine-translated using DeepSeek-R1.

• Original Version: Authored in Chinese by myself
• Accuracy Advisory: Potential discrepancies may exist between translations
• Precedence: The Chinese text shall prevail in case of ambiguity
• Feedback: Technical suggestions regarding translation quality are welcomed

• If cloud development is not enabled, see this article

• Base library version must be 2.3.3* or higher*, recommended to use latest version

• Create new cloud function:
  

• Right-click cloudfunctions, select New Node.js Cloud Function

• Enter login

  • Current appearance of cloud development console:
    

• This function saves openID to local storage and calls error on failure:

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function saveOpenID(error) {
  if (!wx.getStorageSync('openID')) {
    wx.cloud.callFunction({
      name: 'login',
      data: {},
      success: res => {
        console.log('Got user openid: ', res.result.openid)
        wx.setStorageSync('openID', res.result.openid)
      },
      fail: err => {
        console.error(err)
        error()
      }
    })
  }
}