wp-includes/class-wp-application-passwords.php:336Records that an application password has been used.
$user_idint$uuidstringtrue|WP_Error public static function record_application_password_usage( $user_id, $uuid ) { $passwords = static::get_user_application_passwords( $user_id ); foreach ( $passwords as &$password ) { if ( $password['uuid'] !== $uuid ) { continue; } // Only record activity once a day. if ( $password['last_used'] + DAY_IN_SECONDS > time() ) { return true; } $password['last_used'] = time(); $password['last_ip'] = $_SERVER['REMOTE_ADDR']; $saved = static::set_user_application_passwords( $user_id, $passwords ); if ( ! $saved ) { return new WP_Error( 'db_error', __( 'Could not save application password.' ) ); } return true; } // Specified application password not found! return new WP_Error( 'application_password_not_found', __( 'Could not find an application password with that id.' ) ); }Introduced in 5.6.0. Unchanged from 6.7.7 through 7.1.0.
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src/wp-includes/class-wp-application-passwords.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.