How to hide password in gridview?

Question

WPF

I need to hide password cells on datagrid with characters *
I'm using MVVM approach so store ObservableCollection Records in viewmodel.
I have two options:
1. Use a converter when binding the itemsource to the collection, but in that case the new entry does not hide the password.
2. Create a collection of columns in the datagrid and, when linking the column to the corresponding field of the Record class, apply the converter. I created one column for experimentation, the new entry now hides the data behind the characters, however there is a duplication of the columns. I don't know how to fix this.
I ask for your advice, dear programmers!
An example datagrid code using two options:

<!--Первый вариант-->
        <DataGrid ItemsSource="{Binding Records, Converter={StaticResource PassConverter}}" 
                  BorderThickness="0,2,0,0"
                  ColumnWidth="*" 
                  CanUserResizeColumns="False" 
                  CanUserAddRows="False" 
                  CanUserDeleteRows="False" 
                  CanUserResizeRows="False" 
                  IsReadOnly="True"
                  SelectedIndex="{Binding CurrentIndexOfRecord}">
            <DataGrid.Columns>
                <!--Второй вариант-->
                <DataGridTextColumn Header="Login" Binding="{Binding Path=Login, Converter={StaticResource FieldPassConverter}}" />
            </DataGrid.Columns>

Result:

Answer 1

The answer was found.
I will use the second option. And so that the columns are not duplicated in the datagrid, you need to set
the AutoGenerateColumns property to False.