add handling for unauthorized access attempts

this came up during interacting with the backup api
with a read-only user

Author: vagelim

ubiquiti/unifi.py

@@ -61,11 +61,13 @@ def __exit__(self, *args):
 
     def _check_status_code(self,code):
         status_codes = {400: "Invalid credentials",
-                        401: "Invalid login, or login has expired"}
+                        401: "Invalid login, or login has expired",
+                        403: "Current user not authorized to perform action"}
         if code == 401:
             try:
                 self.login()
             except LoggedInException:
+                raise LoggedInException(status_codes[code])
         elif code in status_codes:
             raise LoggedInException(status_codes[code])