Webfinger info: avoid PHP warning when user isn't defined
This should avoid warnings like this one: ``` PHP Warning: Attempt to read property "user_login" on bool in /var/www/html/wp-content/plugins/activitypub/includes/class-webfinger.php on line 27 ```
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@ -23,6 +23,9 @@ class Webfinger {
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}
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$user = \get_user_by( 'id', $user_id );
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if ( ! $user ) {
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return '';
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}
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return $user->user_login . '@' . \wp_parse_url( \home_url(), \PHP_URL_HOST );
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}
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