Hello everyone.
I've one problem about creating user form. I found an example about creating password and implement it into my system. And in another sheet , I already create a list for username and password as reference.

Refer from image attached, after user click the button of Guarantee Letter, the login (password required) form will popup. The problem is the selected username a not showing.

The second is, login (new password) also have a problem like attached image. I'm not sure whether I put the wrong reference code or using the wrong selected object.

Please help me. Thank so much