Indefinite Variable / Callback in javascript Accountaddress

Question

I am facing a problem in my project: Ultimately it is as follows: My local variable is not being set even if it is set. is Callback problem, how can I solve?

I’ll explain the situation further below.

in my database it looks like this: Email Address | Member ID;

I need to search the member ID by the email address it provides to me.

Within the getCont function there are two local variables, one obeject and one function, and two log;

The Member ID is a local variable of the getCont function and takes indefinite. address is a local variable representing the email provided by the user.

Accountaddress is the object with the name given to my structure in the database, the variable address looks for an ID value;

ex: email address search [email protected] and returns the Member ID and sets the Idmember variable that in the example should be 1; 1st member registration. and Idmember is now set; So far everything works.

Now comes the problem: when I take the Idmember that is in the local scope and do console.log outside the Accountaddress object, it automatically comes back undefined.

I understood that it has the sicronia and callback... blz, how can I callback the Accountaddress object since, it has a function and a return? follows the code below:

Thank you very much

HelloWorld.prototype.getCont = function(cb) { 

    var IDMember; 
    var endereco = window.web3.eth.accounts[0];

    document.getElementById("Address").innerHTML =  endereco;

    this.instance.AccountAddress(endereco, function (error, result) {      
        IDMember = result;   
       document.getElementById("IDAccount").innerHTML =  IDMember;   
       console.log(IDMember);
    }) 

    console.log(AccontAddress()); 
}