Update

app/resources/routes/api.php

@@ -1,9 +1,16 @@
 <?php
 use ProVM\Money\Common\Controller\API;
 
-include_once 'currencies.php';
-include_once 'values.php';
-include_once 'sources.php';
+$files = new DirectoryIterator(implode(DIRECTORY_SEPARATOR, [
+  __DIR__,
+  'api'
+]));
+foreach ($files as $file) {
+  if ($file->isDir()) {
+    continue;
+  }
+  include_once $file->getRealPath();
+}
 
 $app->get('/', API::class);