({
   createAccount : function(component, Account) {
    console.log('inside helper');
    var action = component.get("c.saveAccount");
    console.log('after method called ');
    action.setParams({
        "Account": Account
    });
action.setCallback(this, function(response){
    var state = response.getState();
    if (component.isValid() && state === "SUCCESS") {
        var accounts = component.get("v.accounts");
        accounts.push(response.getReturnValue());
        component.set("v.accounts", accounts);
    }
});
$A.enqueueAction(action);
},

public class NewAccountHandler {
@AuraEnabled
public static Account saveAccount(Account Account) {
    system.debug('***--' + Account);
    upsert Account;
    system.debug('***--1' + Account);
    return Account;
}