Update dh-messages-api and print error if login fails

mautrix_amp/commands/auth.py

@@ -51,6 +51,8 @@ async def login(evt: CommandEvent) -> None:
         else:
             content.set_reply(evt.event_id)
             qr_event_id = await evt.az.intent.send_message(evt.room_id, content)
-    await evt.reply("Successfully logged in")
-    await evt.sender.client.start(session_data=evt.sender.session_data)
-    # await evt.sender.sync()
+    if evt.sender.session_data:
+        await evt.reply("Successfully logged in")
+        await evt.sender.client.start(session_data=evt.sender.session_data)
+    else:
+        await evt.reply("Failed to log in")

dh-messages-api @ f83d735f

-Subproject commit 3911f5e115c6856e568cf05d37c31dcc6c3ce7ef
+Subproject commit f83d735f684718e50e1e9fbdce0abe4ef2345365