How do I convert a SQL query with COUNT for Sequelize

Question

I have this MySQL query:

SELECT
    *,
    (COUNT(msg.id_property)) as 'Number of messages'
FROM properties prop
LEFT OUTER JOIN messages msg on msg.id_property = prop.id_property
GROUP BY prop.id_property
ORDER BY msg.createdAt DESC

But I don't know how I should rewrite this to Sequelize, because the COUNT(msg.id_property) looks strange to write as a Sequelize query.