Add config flow for efergy (#56890)

homeassistant/components/efergy/const.py

@@ -0,0 +1,13 @@
+"""Constants for the Efergy integration."""
+from datetime import timedelta
+
+ATTRIBUTION = "Data provided by Efergy"
+
+CONF_APPTOKEN = "app_token"
+CONF_CURRENT_VALUES = "current_values"
+
+DATA_KEY_API = "api"
+DEFAULT_NAME = "Efergy"
+DOMAIN = "efergy"
+
+MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=30)