In case the MessageTemplates found by the where argument doesn't exist, create a new MessageTemplates with this data.
OptionalincludeChoose, which related nodes to fetch as well
OptionalomitOmit specific fields from the MessageTemplates
OptionalselectSelect specific fields to fetch from the MessageTemplates
In case the MessageTemplates was found with the provided where argument, update it with this data.
The filter to search for the MessageTemplates to update in case it exists.
MessageTemplates upsert