Add methods to change base url

config/bitinflow-accounts-api.php

@@ -4,4 +4,5 @@ return [
     'client_id'     => env('BITINFLOW_ACCOUNTS_KEY', ''),
     'client_secret' => env('BITINFLOW_ACCOUNTS_SECRET', ''),
     'redirect_url'  => env('BITINFLOW_ACCOUNTS_REDIRECT_URI', ''),
+    'base_url'      => env('BITINFLOW_ACCOUNTS_BASE_URI', ''),
 ];