optional config id

config.sample.yaml

@@ -17,7 +17,9 @@ matrix:
   url: https://matrix.example.com
   # The device ID that is **non pre-existing** device
   # If this device ID already exists, messages will be dropped silently in encrypted rooms
-  device_id: ABCDEFGHIJ
+  # If not set the server will provide a device ID after log in. Note that this ID 
+  # will change each time the bot reconnects.
+  # device_id: ABCDEFGHIJ
   # What to name the logged in device
   device_name: matrix-alertbot
   # List of rooms where the bot can interact

matrix_alertbot/config.py

@@ -103,7 +103,7 @@ class Config:
         if not self.user_token and not self.user_password:
             raise RequiredConfigKeyError("Must supply either user token or password")
 
-        self.device_id: str = self._get_cfg(["matrix", "device_id"], required=True)
+        self.device_id: str = self._get_cfg(["matrix", "device_id"], required=False)
         self.device_name: str = self._get_cfg(
             ["matrix", "device_name"], default="matrix-alertbot"
         )

tests/resources/config/config.minimal.yml

@@ -12,9 +12,6 @@ matrix:
   #user_token: ""
   # The URL of the homeserver to connect to
   url: https://matrix.example.com
-  # The device ID that is **non pre-existing** device
-  # If this device ID already exists, messages will be dropped silently in encrypted rooms
-  device_id: ABCDEFGHIJ
   allowed_rooms:
     - "!abcdefgh:matrix.example.com"