fix hang when kraken is not in config

piker/brokers/kraken.py

@@ -450,11 +450,14 @@ class Client:
 async def get_client() -> Client:
 
     section = get_config()
+    if section: 
         client = Client(
             name=section['key_descr'],
             api_key=section['api_key'],
             secret=section['secret']
         )
+    else:
+        client = Client()
 
     # at startup, load all symbols locally for fast search
     await client.cache_symbols()
@@ -688,6 +691,7 @@ async def trades_dialogue(
 
     # Authenticated block
     async with get_client() as client:
+        if client._api_key:
             acc_name = 'kraken.' + client._name
             trades = await client.get_trades()
 
@@ -751,6 +755,17 @@ async def trades_dialogue(
                             
                             await ems_stream.send(fill_msg.dict())
 
+        else:
+            log.error('Missing Kraken API key: Trades WS connection failed')
+            await ctx.started(({}, {'paper',}))
+
+            async with (
+                ctx.open_stream() as ems_stream,
+                trio.open_nursery() as n,
+            ):
+                ## TODO: maybe add multiple accounts
+                n.start_soon(handle_order_requests, client, ems_stream)
+
 
 async def stream_messages(
     ws: NoBsWs,