How to sort an array by a number inside w/ javascript [duplicate]

So I'm having trouble sorting an array. I'm trying to make it descend from the highest average to the lowest. This is the table ->

[
    {
        "average": "86.8",
        "user": "User1"
    },
    {
        "average": "93",
        "user": "User2"
    },
    {
        "average": "91.5",
        "user": "User3"
    }
]

This is how I set the array

let usr = []
if (users.docs.length > 0) {
    for (const user of users.docs) {
        let exportable = user.data()
        usr.push(exportable)
    }
}