addCategoryToWatchlist.php use undefined method WatchedItem::fromUserTitle()

[jamesmontalvo3]

Maintenance script addCategoryToWatchlist.php failing with the following:

On Meza:

sudo WIKI=mywiki php /opt/htdocs/mediawiki/extensions/WatchAnalytics/maintenance/addCategoryToWatchlist.php --usernames=Someuser --categories=Somecategory
Start processing Category:Person

Adding watchers to [[Some Page]]...
    ...checking Someuser... [b7d62872c3b93403c123b18d] [no req]   Error from line 119 of /opt/htdocs/mediawiki/extensions/WatchAnalytics/maintenance/addCategoryToWatchlist.php: Call to undefined method WatchedItem::fromUserTitle()
Backtrace:
#0 /opt/htdocs/mediawiki/maintenance/doMaintenance.php(94): WatchAnalyticsAddCategoryToWatchlist->execute()
#1 /opt/htdocs/mediawiki/extensions/WatchAnalytics/maintenance/addCategoryToWatchlist.php(145): require_once(string)
#2 {main}

[cicalese]

That method and addWatch() were deprecated in MW 1.27 and subsequently removed. For MW 1.36+, use the WatchlistManager class.