def user(context, name, email):
    """Add a new or display information about an existing user."""
    existing_user = context.obj['store'].user(email)
    if existing_user:
        click.echo(existing_user.to_dict())
    elif name:
        new_user = context.obj['store'].add_user(name, email)
        click.echo(click.style(f"New user added: {email} ({new_user.id})", fg='green'))
    else:
        click.echo(click.style('User not found', fg='yellow'))
Add a new or display information about an existing user.