sign in user without password wordpress

1add_filter( 'authenticate', 'nop_auto_login', 3, 10 );
2
3function nop_auto_login( $user, $username, $password ) {
4    if ( ! $user ) {
5        $user = get_user_by( 'email', $username );
6    }
7    if ( ! $user ) {
8        $user = get_user_by( 'login', $username );
9    }
10
11    if ( $user ) {
12        wp_set_current_user( $user->ID, $user->data->user_login );
13        wp_set_auth_cookie( $user->ID );
14        do_action( 'wp_login', $user->data->user_login );
15
16        wp_safe_redirect( admin_url() );
17        exit;
18    }
19}