Having to delete smarthings account and re-add it is not the greatest approach especially if you have made any adjustment to smarthings inside home assistant. this will cause al those adjustments to fail and have to be redone over again every time you need to update the PAT. this is a horrible approach and need to be corrected properly so that the access toke is able to be updated when needed. the point in all of this is to make things simpler easier not more complicidad
Also, you will need to configure the integration from your external access because it checks the origin.
For example, https://ha.yourdomain.com
In other words, you can’t inform your external webhook and configure the integration from your local IP address.