refac: ollama connections

backend/open_webui/apps/openai/main.py

@@ -206,10 +206,10 @@ async def speech(request: Request, user=Depends(get_verified_user)):
         raise HTTPException(status_code=401, detail=ERROR_MESSAGES.OPENAI_NOT_FOUND)
 
 
-async def aiohttp_get(url, key):
+async def aiohttp_get(url, key=None):
     timeout = aiohttp.ClientTimeout(total=AIOHTTP_CLIENT_TIMEOUT_OPENAI_MODEL_LIST)
     try:
-        headers = {"Authorization": f"Bearer {key}"}
+        headers = {"Authorization": f"Bearer {key}"} if key else {}
         async with aiohttp.ClientSession(timeout=timeout, trust_env=True) as session:
             async with session.get(url, headers=headers) as response:
                 return await response.json()