function saveContexts(userId, contexts) {
let UID = userId;

//get all contexts + parameters

if (contexts === undefined) {
    console.log("contexts are undefined! returning");
    return false;
}
db.collection("user-contexts-prod").doc(UID).set({
    dateCreated: new Date(),
    contexts: JSON.stringify(contexts)
})
    .then(function () {
        console.log("success!");
        return true;
    })
    .catch(function (error) {
        console.log("error writing document..", error);
        return false;
    });
}

async function getContexts(userId) {
    let UID = userId;
    let docRef = db.collection("user-contexts-prod").doc(UID);
    return docRef.get()
        .then(res => {
            if (res.exists) {
                let contexts = JSON.parse(res.data().contexts);
                console.log("<><> parsed contexts <><>: ");
                console.log(contexts);
                return contexts;
            } else {
                console.log(" UID DOES NOT EXIST!");
                return false;
            }
        })
}

knownUser = await db.isKnownUser(senderId);
                if (knownUser) {
                    //knownUser
                    console.log("Known user");
                    let userData = db.getUserDataById(senderId)

                    //initialize contexts with data you need

                    payload = returningUser_useSameData();
                    messenger.send(payload, senderId);

                    dashbot.logBotMessage(payload.toString, sessionId, intentName);
                    break;

                } else {
                    //newUser
                    console.log("new user");

                    createContext('await_fillInTogether', '', sessionPath, sessionId, 1);
                    createContext('session', '', sessionPath, sessionId, 500);

                    payload = fillInTogetherNewUser();
                    messenger.send(payload, senderId);

                    dashbot.logBotMessage(payload.toString, sessionId, intentName);
                    break;
                }