Retrieve a list of currently supported currencies by the currency API
https://api.upcdatabase.org/currency/latest/?base=XXX
The response contains an array of all the currently supported currencies in JSON format.
{ "success": true, "date": "2020-03-26", "timestamp": 1585239769, "base": "USD", "rates": { "AUD": 1.655, "CAD": 1.404, "CHF": 0.964, "EUR": 0.907, "GBP": 0.824, "JPY": 109.465, "NZD": 1.679, "SEK": 9.951, "USD": 1 } }