added a payment_option field in the executeTrade method and changed t…

…he default to payment_option=2 (due to the fact that the default value of bitcoin.de side is set to 1, however an payment_option value of 1 is not possible as bitcoin.de removed the express trading option since the fidor bank shut down.) To allow other payment_options as well the param can be overwritten.

btcde.py

@@ -266,12 +266,14 @@ def showMyOrderDetails(self, trading_pair, order_id):
         p = ParameterBuilder({}, {}, uri)
         return self.APIConnect('GET', p)
 
-    def executeTrade(self, trading_pair, order_id, order_type, amount):
+    def executeTrade(self, trading_pair, order_id, order_type, amount, payment_option=2):
         """Buy/Sell on a specific Order."""
         uri = f'{self.apibase}{trading_pair}/trades/{order_id}'
         params = { 'type': order_type,
-                   'amount_currency_to_trade': amount}
-        avail_params = ['type', 'amount_currency_to_trade']
+                   'amount_currency_to_trade': amount,
+                   'payment_option': payment_option
+                 } 
+        avail_params = ['type', 'amount_currency_to_trade', 'payment_option']
         p = ParameterBuilder(avail_params, params, uri)
         return self.APIConnect('POST', p)