The getCountries function is going to get a list of countries, just their names, and we're going to get it by currencyCode:
const getCountries = (currencyCode) => {};
This one, just like getExchangeRate, is also going to return a promise from axios.get and the URL we want to get lives over in the browser:
So, right here we have our URL. We have the spot where we're going to dump our currencyCode, so we can knock that out. It's going to be a template string and we're going to get rid of CAD and inject whatever the currencyCode argument is:
const getCountries = (currencyCode) => { return axios.get(`https://restcountries.eu/rest/v2/currency/${currencyCode}`) ...
