How to know the user’s role?

Hi there,

I created three new roles with this plugin. I know the names of the roles(written by myself in Chinese), but I want to get their English names in the code(just like “premium” or “standard” below), how can I get them? Which data table does WP store roles in? Thank you~

add_filter( ‘mwai_stats_credits’, function ( $credits, $userId ) {

$user = get_userdata( $userId );

if ( !empty( $user->roles) && is_array( $user->roles ) )

{ foreach ( $user->roles as $role)

{ if ( $role === ‘premium’ )

{ return 50; }

if ( $role === ‘standard’ )

{ return 10; } } } // This will be basically the default value set in the plugin settings // for logged-in users.

return $credits; }, 10, 2);