Is there a way to check for asyn functions called directly without await

Often times I accidentally call an asynchronous function directly like so

let get_users;
let users;

/*
 * @return data on success and null otherwise
*/
get_users = async function (){
    let users;

    users = await $.ajax({...});

    return users;
}

users = get_users();

if (users === null){
    console.log ('Fail');
}
else{
    console.log ('Success');
}

This will write Success every time because the returned promise is not null and it is quite a nightmare to debug. I can go through and append something to all of my 500+ asynchronous functions (eg. foo.bar_async ()) and then use grep to find all cases where a *_async function was called without the await command, but that is very hard and very ugly. Is there a better way to debug this (NOTE I do not believe JSHint can handle this, especially when files are loaded as modules)?