Leverage access and refresh tokens if available (#575)

* Leverage access and refresh tokens if available

* Update homeassistant.py

* Update homeassistant.py

* Update proxy.py

* Migrate HomeAssistant to new exception layout

* Fix build for 3.7

* Cleanups

* Fix style

* fix log strings

* Fix new style

* Fix travis build

* python 3.7

* next try

* fix

* fix lint

* Fix lint p2

* Add logging

* Fix logging

* fix access

* Fix spell

* fix return

* Fix runtime

* Add to hass config

hassio/exceptions.py

@@ -1,4 +1,7 @@
 """Core Exceptions."""
+import asyncio
+
+import aiohttp
 
 
 class HassioError(Exception):
@@ -11,6 +14,29 @@ class HassioNotSupportedError(HassioError):
     pass
 
 
+# HomeAssistant
+
+class HomeAssistantError(HassioError):
+    """Home Assistant exception."""
+    pass
+
+
+class HomeAssistantUpdateError(HomeAssistantError):
+    """Error on update of a Home Assistant."""
+    pass
+
+
+class HomeAssistantAuthError(HomeAssistantError):
+    """Home Assistant Auth API exception."""
+    pass
+
+
+class HomeAssistantAPIError(
+        HomeAssistantAuthError, asyncio.TimeoutError, aiohttp.ClientError):
+    """Home Assistant API exception."""
+    pass
+
+
 # HassOS
 
 class HassOSError(HassioError):