3. For Currencylayer, you need to set your `access_key` in your `services.php` config file. If you write your own, or use a different provider, this will be different:

 ```
 // services.php
 'currencylayer' => [
 
     'access_key' => 'YourAccessKeyHere',
     
 ],
 ```
4. To use, simply make use of the ForexService class and run `getRate()` to get the rate between two currencies, or `convert()` to convery an amount of a certain currency into another currency. Makes extensive use of the `mathiasverraes/money` money package.

### Examples

1. Get a rate. Returns a `CurrencyPair` object:

 ```
 $forex = app('Opb\Forex\ForexService');
 $gbp = new Money\Currency('GBP');
 $usd = new Money\Currency('USD');
 $rate = $forex->getRate($gbp, $usd);
 var_dump($rate);
 
 class Money\CurrencyPair#709 (3) {
     private $baseCurrency =>
     class Money\Currency#690 (1) {
         private $name =>
         string(3) "GBP"
     }
     private $counterCurrency =>
     class Money\Currency#660 (1) {
         private $name =>
         string(3) "USD"
     }
     private $ratio =>
     double(1.5634111755758)
 }
 ```
2. Convert from an amount of `Money` (in cents/pence) to another `Currency`

 ```
 $forex = app('Opb\Forex\ForexService');
 $from = new Money\Money(10000, new Money\Currency('GBP'));
 $to = new Money\Currency('USD');
 $result = $forex->convert($from, $to);
 var_dump($result);
 
 class Money\Money#681 (2) {
     private $amount =>
     int(15611)
     private $currency =>
     class Money\Currency#706 (1) {
         private $name =>
         string(3) "USD"
     }
 }
 ```
3. You can optionally supply a `DateTime` object as the third parameter to `getRate()` and `convert()` and this will attempt to get the rate for that given day.