{deps, [
    {quicer, {git, "https://github.com/qzhuyan/quic.git", {tag, "0.1.0"}}},
    ...

application:ensure_all_started(quicer),
Port = 4567,
LOptions = [ {certfile, "cert.pem"}
           , {keyfile,  "key.pem"}
           , {alpn, ["sample"]}
           , {peer_bidi_stream_count, 1}
             ],
{ok, L} = quicer:listen(Port, LOptions),
{ok, Conn} = quicer:accept(L, [], 120000),
{ok, Conn} = quicer:handshake(Conn),
{ok, Stm} = quicer:accept_stream(Conn, []),
receive {quic, <<"ping">>, Stm, _Props} -> ok end,
{ok, 4} = quicer:send(Stm, <<"pong">>),
quicer:close_listener(L).

application:ensure_all_started(quicer),
Port = 4567,
{ok, Conn} = quicer:connect("localhost", Port, [{alpn, ["sample"]}, {verify, none}], 5000),
{ok, Stm} = quicer:start_stream(Conn, []),
{ok, 4} = quicer:send(Stm, <<"ping">>),
receive {quic, <<"pong">>, Stm, _Props} -> ok end,
ok = quicer:close_connection(Conn).

%% Connect to google and disconnect, 
%% You could also tweak the parameters to see how it goes
{ok, Conn} = quicer:connect("google.com", 443, [{alpn, ["h3"]}, 
                            {verify, verify_peer}, 
                            {peer_unidi_stream_count, 3}], 5000),
quicer:shutdown_connection(Conn).

    {ok, Conn} = quicer:connect(
        "google.com",
        443,
        [
            {verify, verify_peer},
            {sslkeylogfile, "/tmp/SSLKEYLOGFILE"},
            {peer_unidi_stream_count, 3},
            {alpn, ["h3"]}
        ],
        5000
    )