make fields optional

Author: Webber Sharhan

lib/omniauth/strategies/instagram.rb

@@ -31,7 +31,7 @@ def request_phase
 
       def raw_info
         endpoint = '/me'
-        fields = 'account_type,id,media_count,username'
+        fields = options[:fields] || 'account_type,id,media_count,username'
         @raw_info ||= access_token.get("#{endpoint}?fields=#{fields}").parsed
       end