class UsersLoginForm(forms.Form):
    username = forms.CharField()
    password = forms.CharField(widget = forms.PasswordInput,)

    def __init__(self, *args, **kwargs):
        super(UsersLoginForm, self).__init__(*args, **kwargs)
        self.fields['username'].widget.attrs.update({
            'class': 'form-control',
            "name":"username"})
        self.fields['password'].widget.attrs.update({
            'class': 'form-control',
            "name":"password"})

    def clean(self, *args, **keyargs):
        username = self.cleaned_data.get("username")
        password = self.cleaned_data.get("password")

        if username and password:
            user = authenticate(username = username, password = password)
            if not user:
                raise forms.ValidationError(_("Username or password incorrect"))
            if not user.check_password(password):
                raise forms.ValidationError(_("Incorrect Password"))
            if not user.is_active:
                raise forms.ValidationError(_("User is no longer active"))

        return super(UsersLoginForm, self).clean(*args, **keyargs)