Disable exchange rates by default.

.env.example

@@ -184,6 +184,11 @@ SEND_REPORT_JOURNALS=true
 # Since this involves an external service, it's optional and disabled by default.
 ENABLE_EXTERNAL_MAP=false
 
+#
+# Enable or disable exchange rate conversion. This function isn't used yet by Firefly III
+#
+ENABLE_EXCHANGE_RATES=false
+
 # Set this value to true if you want Firefly III to download currency exchange rates
 # from the internet. These rates are hosted by the creator of Firefly III inside
 # an Azure Storage Container.

app/Providers/AdminServiceProvider.php

@@ -32,7 +32,7 @@ use Illuminate\Support\ServiceProvider;
 /**
  * Class AdminServiceProvider
  */
-class AdminServiceProvider extends ServiceProvider 
+class AdminServiceProvider extends ServiceProvider
 {
     /**
      * Bootstrap the application services.

config/cer.php

@@ -24,7 +24,7 @@ declare(strict_types=1);
 
 return [
     'url'              => 'https://ff3exchangerates.z6.web.core.windows.net',
-    'enabled'          => true,
+    'enabled'          => env('ENABLE_EXCHANGE_RATES', false),
     'download_enabled' => env('ENABLE_EXTERNAL_RATES', false),
 
     // if currencies are added, default rates must be added as well!