Getting Currency Exchange Rate via API [SOLVED]

Thanks Andreas.

Just a question, How will the backend module recognize what is what on the page code ?

My Current Page Code is like this

import {getCurrency} from 'backend/ArenaApi';

export function button1_click(event, $w) {
	getCurrency($w("#currencysymbol").value)
         .then(rates => $w("#currencyrate").text = rates);
          $w("#currencyrate").show();
}

Should I enter something like this

import {getCurrency} from 'backend/ArenaApi';

export function button1_click(event, $w) {
	getCurrency($w("#currencysymbol").value)
        getCurrency($w("#basecurrency").value)
          .then(rates => $w("#currencyrate").text = rates);
          $w("#currencyrate").show();
}

Any ideas ?