Fix dictionary access syntax

.gitignore

@@ -1,3 +1,4 @@
 *.bak
 *.bck
 *.kicad_pcb-bak
+code/config.json

code/main.py

@@ -18,7 +18,7 @@ wifi_host.active(False)
 wifi_guest = network.WLAN(network.STA_IF)
 wifi_guest.active(True)
 if not wifi_guest.isconnected():
-    wifi_guest.connect(config.wifi.ssid, config.wifi.password)
+    wifi_guest.connect(config['wifi']['ssid'], config['wifi']['password'])
     while not wifi_guest.isconnected():
         pass
 print(wifi_guest.ifconfig())