Check whether login succeeds

init.lua

@@ -79,21 +79,21 @@ end
 
 function MatrixChat:sync(timeout)
 	http.fetch(MatrixChat:get_sync_table(timeout),
-	function(res) 
-		if res == nil then -- received nothing from server
-			minetest.log("error", "matrix_bridge - sync response is nil")
-		elseif res.code == 0 then
-			minetest.log("info", "matrix_bridge - not found / timeout")
-		elseif res.code == 404 then
-		else
-			local response = minetest.parse_json(res.data)
-			if response ~= nil then
-				MatrixChat:minechat(response)
-				self.since = response.next_batch
+		function(res) 
+			if res == nil then -- received nothing from server
+				minetest.log("error", "matrix_bridge - sync response is nil")
+			elseif res.code == 0 then
+				minetest.log("info", "matrix_bridge - not found / timeout")
+			elseif res.code == 404 then
+			else
+				local response = minetest.parse_json(res.data)
+				if response ~= nil then
+					MatrixChat:minechat(response)
+					self.since = response.next_batch
+				end
 			end
 		end
-	end
-)
+	)
 end
 
 -- https://matrix.org/docs/api/client-server/#post-/login
@@ -107,17 +107,20 @@ function MatrixChat:login()
 			if res.code == 200 then
 				minetest.log("action", res.data)
 				local data = minetest.parse_json(res.data)
-				self.token  = data.access_token
-				self.userid = data.user_id
-				MatrixChat:sync()
-				minetest.log("action", "Matrix authenticated")
+				if data.access_token ~= nil and data.user_id ~= nil then
+					self.token  = data.access_token
+					self.userid = data.user_id
+					MatrixChat:sync()
+					minetest.log("action", "Matrix authenticated")
+				else
+					minetest.log("error", "Matrix login failed")
+				end
 			else
 				minetest.log("error", to_string(res))
 			end
 		end
 	)
 end
-MatrixChat:login()
 
 -- https://matrix.org/docs/api/client-server/#put-/rooms/-roomId-/send/-eventType-/-txnId-
 -- PUT /rooms/{roomId}/send/{eventType}/{txnId}
@@ -240,4 +243,4 @@ minetest.register_on_chat_message(function(name, message)
 	MatrixChat:send("<"..name.."> "..message)
 end)
 
-
+minetest.register_on_mods_loaded(function() MatrixChat:login() end)