Fix fritzbox integration errors (#34639)

Author: escoand

homeassistant/components/fritzbox/config_flow.py

@@ -83,7 +83,7 @@ async def async_step_user(self, user_input=None):
         if user_input is not None:
 
             for entry in self.hass.config_entries.async_entries(DOMAIN):
-                if entry.data[CONF_HOST] == user_input[CONF_HOST]:
+                if entry.data.get(CONF_HOST) == user_input[CONF_HOST]:
                     if entry.data != user_input:
                         self.hass.config_entries.async_update_entry(
                             entry, data=user_input
@@ -117,7 +117,7 @@ async def async_step_ssdp(self, user_input):
                 return self.async_abort(reason="already_in_progress")
 
         for entry in self.hass.config_entries.async_entries(DOMAIN):
-            if entry.data[CONF_HOST] == host:
+            if entry.data.get(CONF_HOST) == host:
                 if entry.data != user_input:
                     self.hass.config_entries.async_update_entry(entry, data=user_input)
                 return self.async_abort(reason="already_configured")