Add possibility to load Matrix credentials from env configuration

tfjm/matrix.py

@@ -23,14 +23,18 @@ class Matrix:
         Retrieve the bot account.
         If not logged, log in and store access token.
         """
-        if not os.getenv("SYNAPSE_PASSWORD"):
+        if not os.getenv("SYNAPSE_PASSWORD") and not os.getenv("SYNAPSE_TOKEN"):
             return FakeMatrixClient()
 
         from nio import AsyncClient
         client = AsyncClient("https://tfjm.org", "@tfjmbot:tfjm.org")
         client.user_id = "@tfjmbot:tfjm.org"
 
-        if os.path.isfile(".matrix_token"):
+        if os.getenv("SYNAPSE_TOKEN"):
+            client.access_token = os.getenv("SYNAPSE_TOKEN")
+            client.device_id = os.getenv("SYNAPSE_DEVICE")
+            return client
+        elif os.path.isfile(".matrix_token"):
             with open(".matrix_device", "r") as f:
                 cls._device_id = f.read().rstrip(" \t\r\n")
                 client.device_id = cls._device_id