The interface for binding mobile phone number shows failure.

**Use mini program to bind mobile phone number interface: getPhoneNumber WeChat has mandatory requirements: ** **** [**https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/getPhoneNumber.html**](https://developers.weixin.qq.com/miniprogram/dev/framework/open-ability/getPhoneNumber.html)  If the self-examination is not caused by the above problem, then please call the factory login api again (the purpose of re-logging in is to obtain the latest session_key to ensure that the mobile phone number can be obtained) **Is there any problem with the above troubleshooting? ** 1. In the user management in the background, check the user's information to see if this user has already bound a mobile phone number. If there is already a mobile phone number, it cannot be bound! 2. In user management, search for this mobile phone number and confirm whether this mobile phone number has been bound by someone else. A mobile phone number can only be bound to one account!