MyMovies/MyMoviesWPF/MVVM/View/Authorization.xaml

<Window x:Class="MyMoviesWPF.MVVM.View.Authorization"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"      
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:MyMoviesWPF.MVVM.View"
        mc:Ignorable="d"
        Title="Authorization" Height="712" Width="450"
        ResizeMode="NoResize"
        >
    <Grid>

        <TextBox 
                HorizontalAlignment="Left" Margin="32,54,0,0" VerticalAlignment="Top" Width="368" Height="50"
                Text="{Binding EnteredLogin}" FontFamily="Segoe UI" 
                Style="{DynamicResource MaterialDesignOutlinedTextBox}"  BorderBrush="{DynamicResource MaterialDesignBodyLight}" 
                materialDesign:HintAssist.Hint="Login" BorderThickness="1.5" />


        <PasswordBox 
                Name="Password" 
                HorizontalAlignment="Left" Margin="32,142,0,0" VerticalAlignment="Top" Width="368" Height="50"
                Style="{DynamicResource MaterialDesignOutlinedPasswordBox}"  BorderBrush="{DynamicResource MaterialDesignBodyLight}" 
                materialDesign:HintAssist.Hint="Password" BorderThickness="1.5" />

        <Button 
                    Content="Войти"
                    FontFamily="Segoe UI" FontSize="20" FontStyle="Normal" FontWeight="Normal" Foreground="White"
                    Command="{Binding SignIn}" CommandParameter="{Binding ElementName=Password}" Margin="32,482,50,160" Cursor="Hand" />
    </Grid>
</Window>