How to set a longer timeout on elixir grpc

I’m getting a timeout error in my (10-second or so long-running) grpc call over the internet:

{:error, %GRPC.RPCError{status: 4, message: “Deadline Exceeded”, details: nil}}

Here is the call. I’ve tried, both timeout and deadline, nothing works.

def intradayBarRequest(topic,
chan,
interval \ 60,
start_dtime \ date_back(DateTime.utc_now(), 6, :month),
end_dtime \ DateTime.utc_now()) do
sts = %Google.Protobuf.Timestamp{seconds: start_dtime |> DateTime.to_unix}
dbg(sts, label: :sts)
ets = %Google.Protobuf.Timestamp{seconds: end_dtime |> DateTime.to_unix}
dbg(ets, label: :ets)
tpc = %Bloomberg.IntradayBarRequest{topic: topic, start: sts, end: ets, interval: interval}
dbg(tpc, label: :tpc)
deadline = DateTime.add(DateTime.utc_now(), 60, :second) # 60 seconds
#Bloomberg.Bbg.Stub.intraday_bar_request(chan, tpc, metadata: [timeout: 60])
Bloomberg.Bbg.Stub.intraday_bar_request(chan, tpc, metadata: [deadline: deadline])
end

You can see where I setup the channel here.

Any ideas how to increase deadlines to this doesn’t happen?