How to fire event ng-change

[boton]

Currently trying to build a script to login but after changing the username and password and clicking login the website doesn't recognize that I changed the values. After some more reading it looks like I have to fire events so the website recognizes it.
I inspected the website and found this code alongside with the username/password

Code: Select all

ng-change = "vm.changeInput()"

I have tried .fireEvent("onclick") and .fireEvent("onchange") but neither of this seem to work still. Any help would be great. Thanks