Disable Magic Login for specific roles

If you want to disable Magic Login for specific roles instead of disabling it on user level, you can do that with this snippet:

/**
 * Disable Magic Login for specific roles
 *
 * @param null   $null default value for shortcircuit
 * @param object $user \WP_User object
 *
 * @return \WP_Error|null
 */
function magic_login_maybe_disabled_for_role( $null, $user ) {
    if ( ! is_a( $user, '\WP_User' ) ) {
        return $null;
    }

    $roles_to_disable = ['administrator', 'editor', 'author'];
    foreach ( $roles_to_disable as $role ) {
        if ( in_array( $role, $user->roles ) ) {
            return new \WP_Error( 'magic_login_disabled_role', esc_html__( 'Magic login is not allowed for your role!', 'magic-login' ) );
        }
    }

    return $null;
}

add_filter( 'magic_login_pre_send_login_link', __NAMESPACE__ . '\\magic_login_maybe_disabled_for_role', 20, 2 );

In this example, Magic Login will be disabled for admin, editor and author roles.