[
    {
        _id: ObjectId("66776075b320153869b17599"),
        "surname":"Smith",
        "forename":"Alan",
        "friendList":[]
    },
    {
        _id: ObjectId("666a6075b326789869b17599"),
        "surname":"Fitzgerald",
        "forename":"Patrick",
        "friendList":[{friend: ObjectId("666a6075b320153869b17599"),type:'colleague'}]
    }
]
