diff --git a/src/greptime_v_1_greptime_database_bhvr.erl b/src/greptime_v_1_greptime_database_bhvr.erl
index 8e09006..bf2858e 100644
--- a/src/greptime_v_1_greptime_database_bhvr.erl
+++ b/src/greptime_v_1_greptime_database_bhvr.erl
@@ -8,10 +8,9 @@
 -module(greptime_v_1_greptime_database_bhvr).
 
 %% Unary RPC
--callback handle(ctx:t(), database_pb:greptime_request()) ->
-    {ok, database_pb:greptime_response(), ctx:t()} | grpcbox_stream:grpc_error_response().
+-callback handle(ctx:t(), greptimedb_database_pb:greptime_request()) ->
+    {ok, greptimedb_database_pb:greptime_response(), ctx:t()} | grpcbox_stream:grpc_error_response().
 
-%% 
+%%
 -callback handle_requests(reference(), grpcbox_stream:t()) ->
-    {ok, database_pb:greptime_response(), ctx:t()} | grpcbox_stream:grpc_error_response().
-
+    {ok, greptimedb_database_pb:greptime_response(), ctx:t()} | grpcbox_stream:grpc_error_response().
diff --git a/src/greptime_v_1_greptime_database_client.erl b/src/greptime_v_1_greptime_database_client.erl
index b3bb5ce..be12789 100644
--- a/src/greptime_v_1_greptime_database_client.erl
+++ b/src/greptime_v_1_greptime_database_client.erl
@@ -15,7 +15,7 @@
 -define(is_ctx(Ctx), is_tuple(Ctx) andalso element(1, Ctx) =:= ctx).
 
 -define(SERVICE, 'greptime.v1.GreptimeDatabase').
--define(PROTO_MODULE, 'database_pb').
+-define(PROTO_MODULE, 'greptimedb_database_pb').
 -define(MARSHAL_FUN(T), fun(I) -> ?PROTO_MODULE:encode_msg(I, T) end).
 -define(UNMARSHAL_FUN(T), fun(I) -> ?PROTO_MODULE:decode_msg(I, T) end).
 -define(DEF(Input, Output, MessageType), #grpcbox_def{service=?SERVICE,
@@ -24,24 +24,24 @@
                                                       unmarshal_fun=?UNMARSHAL_FUN(Output)}).
 
 %% @doc Unary RPC
--spec handle(database_pb:greptime_request()) ->
-    {ok, database_pb:greptime_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
+-spec handle(greptimedb_database_pb:greptime_request()) ->
+    {ok, greptimedb_database_pb:greptime_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 handle(Input) ->
     handle(ctx:new(), Input, #{}).
 
--spec handle(ctx:t() | database_pb:greptime_request(), database_pb:greptime_request() | grpcbox_client:options()) ->
-    {ok, database_pb:greptime_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
+-spec handle(ctx:t() | greptimedb_database_pb:greptime_request(), greptimedb_database_pb:greptime_request() | grpcbox_client:options()) ->
+    {ok, greptimedb_database_pb:greptime_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 handle(Ctx, Input) when ?is_ctx(Ctx) ->
     handle(Ctx, Input, #{});
 handle(Input, Options) ->
     handle(ctx:new(), Input, Options).
 
--spec handle(ctx:t(), database_pb:greptime_request(), grpcbox_client:options()) ->
-    {ok, database_pb:greptime_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
+-spec handle(ctx:t(), greptimedb_database_pb:greptime_request(), grpcbox_client:options()) ->
+    {ok, greptimedb_database_pb:greptime_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 handle(Ctx, Input, Options) ->
     grpcbox_client:unary(Ctx, <<"/greptime.v1.GreptimeDatabase/Handle">>, Input, ?DEF(greptime_request, greptime_response, <<"greptime.v1.GreptimeRequest">>), Options).
 
-%% @doc 
+%% @doc
 -spec handle_requests() ->
     {ok, grpcbox_client:stream()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 handle_requests() ->
@@ -58,4 +58,3 @@ handle_requests(Options) ->
     {ok, grpcbox_client:stream()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 handle_requests(Ctx, Options) ->
     grpcbox_client:stream(Ctx, <<"/greptime.v1.GreptimeDatabase/HandleRequests">>, ?DEF(greptime_request, greptime_response, <<"greptime.v1.GreptimeRequest">>), Options).
-
diff --git a/src/greptime_v_1_health_check_bhvr.erl b/src/greptime_v_1_health_check_bhvr.erl
index b8573ed..2553b0e 100644
--- a/src/greptime_v_1_health_check_bhvr.erl
+++ b/src/greptime_v_1_health_check_bhvr.erl
@@ -8,6 +8,5 @@
 -module(greptime_v_1_health_check_bhvr).
 
 %% Unary RPC
--callback health_check(ctx:t(), health_pb:health_check_request()) ->
-    {ok, health_pb:health_check_response(), ctx:t()} | grpcbox_stream:grpc_error_response().
-
+-callback health_check(ctx:t(), greptimedb_health_pb:health_check_request()) ->
+    {ok, greptimedb_health_pb:health_check_response(), ctx:t()} | grpcbox_stream:grpc_error_response().
diff --git a/src/greptime_v_1_health_check_client.erl b/src/greptime_v_1_health_check_client.erl
index 576eead..db4e07c 100644
--- a/src/greptime_v_1_health_check_client.erl
+++ b/src/greptime_v_1_health_check_client.erl
@@ -15,7 +15,7 @@
 -define(is_ctx(Ctx), is_tuple(Ctx) andalso element(1, Ctx) =:= ctx).
 
 -define(SERVICE, 'greptime.v1.HealthCheck').
--define(PROTO_MODULE, 'health_pb').
+-define(PROTO_MODULE, 'greptimedb_health_pb').
 -define(MARSHAL_FUN(T), fun(I) -> ?PROTO_MODULE:encode_msg(I, T) end).
 -define(UNMARSHAL_FUN(T), fun(I) -> ?PROTO_MODULE:decode_msg(I, T) end).
 -define(DEF(Input, Output, MessageType), #grpcbox_def{service=?SERVICE,
@@ -24,20 +24,19 @@
                                                       unmarshal_fun=?UNMARSHAL_FUN(Output)}).
 
 %% @doc Unary RPC
--spec health_check(health_pb:health_check_request()) ->
-    {ok, health_pb:health_check_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
+-spec health_check(greptimedb_health_pb:health_check_request()) ->
+    {ok, greptimedb_health_pb:health_check_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 health_check(Input) ->
     health_check(ctx:new(), Input, #{}).
 
--spec health_check(ctx:t() | health_pb:health_check_request(), health_pb:health_check_request() | grpcbox_client:options()) ->
-    {ok, health_pb:health_check_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
+-spec health_check(ctx:t() | greptimedb_health_pb:health_check_request(), greptimedb_health_pb:health_check_request() | grpcbox_client:options()) ->
+    {ok, greptimedb_health_pb:health_check_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 health_check(Ctx, Input) when ?is_ctx(Ctx) ->
     health_check(Ctx, Input, #{});
 health_check(Input, Options) ->
     health_check(ctx:new(), Input, Options).
 
--spec health_check(ctx:t(), health_pb:health_check_request(), grpcbox_client:options()) ->
-    {ok, health_pb:health_check_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
+-spec health_check(ctx:t(), greptimedb_health_pb:health_check_request(), grpcbox_client:options()) ->
+    {ok, greptimedb_health_pb:health_check_response(), grpcbox:metadata()} | grpcbox_stream:grpc_error_response() | {error, any()}.
 health_check(Ctx, Input, Options) ->
     grpcbox_client:unary(Ctx, <<"/greptime.v1.HealthCheck/HealthCheck">>, Input, ?DEF(health_check_request, health_check_response, <<"greptime.v1.HealthCheckRequest">>), Options).
-
diff --git a/src/column_pb.erl b/src/greptimedb_column_pb.erl
similarity index 99%
rename from src/column_pb.erl
rename to src/greptimedb_column_pb.erl
index 7b3cf28..6d802c8 100644
--- a/src/column_pb.erl
+++ b/src/greptimedb_column_pb.erl
@@ -3,7 +3,7 @@
 %% Automatically generated, do not edit
 %% Generated by gpb_compile version 4.19.7
 %% Version source: file
--module(column_pb).
+-module(greptimedb_column_pb).
 
 -export([encode_msg/2, encode_msg/3]).
 -export([decode_msg/2, decode_msg/3]).
diff --git a/src/common_pb.erl b/src/greptimedb_common_pb.erl
similarity index 99%
rename from src/common_pb.erl
rename to src/greptimedb_common_pb.erl
index 15f2d06..b26866f 100644
--- a/src/common_pb.erl
+++ b/src/greptimedb_common_pb.erl
@@ -3,7 +3,7 @@
 %% Automatically generated, do not edit
 %% Generated by gpb_compile version 4.19.7
 %% Version source: file
--module(common_pb).
+-module(greptimedb_common_pb).
 
 -export([encode_msg/2, encode_msg/3]).
 -export([decode_msg/2, decode_msg/3]).
diff --git a/src/database_pb.erl b/src/greptimedb_database_pb.erl
similarity index 99%
rename from src/database_pb.erl
rename to src/greptimedb_database_pb.erl
index b04a808..4d34b30 100644
--- a/src/database_pb.erl
+++ b/src/greptimedb_database_pb.erl
@@ -3,7 +3,7 @@
 %% Automatically generated, do not edit
 %% Generated by gpb_compile version 4.19.7
 %% Version source: file
--module(database_pb).
+-module(greptimedb_database_pb).
 
 -export([encode_msg/2, encode_msg/3]).
 -export([decode_msg/2, decode_msg/3]).
diff --git a/src/ddl_pb.erl b/src/greptimedb_ddl_pb.erl
similarity index 99%
rename from src/ddl_pb.erl
rename to src/greptimedb_ddl_pb.erl
index 186ba8f..3f7239a 100644
--- a/src/ddl_pb.erl
+++ b/src/greptimedb_ddl_pb.erl
@@ -3,7 +3,7 @@
 %% Automatically generated, do not edit
 %% Generated by gpb_compile version 4.19.7
 %% Version source: file
--module(ddl_pb).
+-module(greptimedb_ddl_pb).
 
 -export([encode_msg/2, encode_msg/3]).
 -export([decode_msg/2, decode_msg/3]).
diff --git a/src/health_pb.erl b/src/greptimedb_health_pb.erl
similarity index 99%
rename from src/health_pb.erl
rename to src/greptimedb_health_pb.erl
index d159454..1d18b74 100644
--- a/src/health_pb.erl
+++ b/src/greptimedb_health_pb.erl
@@ -3,7 +3,7 @@
 %% Automatically generated, do not edit
 %% Generated by gpb_compile version 4.19.7
 %% Version source: file
--module(health_pb).
+-module(greptimedb_health_pb).
 
 -export([encode_msg/2, encode_msg/3]).
 -export([decode_msg/2, decode_msg/3]).
diff --git a/src/greptimedb_values.erl b/src/greptimedb_values.erl
index 59d8914..f3c2154 100644
--- a/src/greptimedb_values.erl
+++ b/src/greptimedb_values.erl
@@ -15,7 +15,8 @@
 -module(greptimedb_values).
 
 -export([int32_value/1, int64_value/1, float64_value/1, boolean_value/1, binary_value/1,
-         string_value/1, date_value/1, datetime_value/1, timestamp_second_value/1,
+         string_value/1, date_value/1, datetime_value/1, timestamp_second_value/1, uint32_value/1,
+         uint64_value/1,
          timestamp_millisecond_value/1, timestamp_microsecond_value/1,
          timestamp_nanosecond_value/1]).
 
@@ -25,6 +26,12 @@ int32_value(V) ->
 int64_value(V) ->
     #{values => #{i64_values => [V]}, datatype => 'INT64'}.
 
+uint32_value(V) ->
+    #{values => #{u32_values => [V]}, datatype => 'UINT32'}.
+
+uint64_value(V) ->
+    #{values => #{u64_values => [V]}, datatype => 'UINT64'}.
+
 float64_value(V) ->
     #{values => #{f64_values => [V]}, datatype => 'FLOAT64'}.
 
diff --git a/src/greptimedb_worker.erl b/src/greptimedb_worker.erl
index 45931dc..79a5a25 100644
--- a/src/greptimedb_worker.erl
+++ b/src/greptimedb_worker.erl
@@ -18,19 +18,26 @@
 
 -behavihour(ecpool_worker).
 
+-include_lib("grpcbox/include/grpcbox.hrl").
+
 -export([handle/2, stream/1, ddl/0, health_check/1]).
 -export([start_link/1, init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2]).
 -export([connect/1]).
 
 -record(state, {channel}).
 
+-define(CALL_TIMEOUT, 12_000).
+-define(HEALTH_CHECK_TIMEOUT, 1_000).
+-define(REQUEST_TIMEOUT, 10_000).
+-define(CONNECT_TIMEOUT, 5_000).
+
 %% ===================================================================
 %% gen_server callbacks
 %% ===================================================================
 init(Args) ->
     logger:debug("[GreptimeDB] genserver has started (~w)~n", [self()]),
     Endpoints = proplists:get_value(endpoints, Args),
-    Options = proplists:get_value(gprc_options, Args, #{}),
+    Options = proplists:get_value(gprc_options, Args, #{connect_timeout => ?CONNECT_TIMEOUT}),
     Channels =
         lists:map(fun({Schema, Host, Port}) -> {Schema, Host, Port, []} end, Endpoints),
     Channel = list_to_atom(pid_to_list(self())),
@@ -38,16 +45,21 @@ init(Args) ->
     {ok, #state{channel = Channel}}.
 
 handle_call({handle, Request}, _From, #state{channel = Channel} = State) ->
-    Reply = greptime_v_1_greptime_database_client:handle(Request, #{channel => Channel}),
+    Ctx = ctx:with_deadline_after(?REQUEST_TIMEOUT, millisecond),
+    Reply = greptime_v_1_greptime_database_client:handle(Ctx, Request, #{channel => Channel}),
     case Reply of
         {ok, Resp, _} ->
             {reply, {ok, Resp}, State};
+        {error, {?GRPC_STATUS_UNAUTHENTICATED, Msg}, Other} ->
+            {reply, {error, {unauth, Msg, Other}}, State};
         Err ->
             {reply, Err, State}
     end;
 handle_call(health_check, _From, #state{channel = Channel} = State) ->
     Request = #{},
-    Reply = greptime_v_1_health_check_client:health_check(Request, #{channel => Channel}),
+    Ctx = ctx:with_deadline_after(?HEALTH_CHECK_TIMEOUT, millisecond),
+    Reply =
+        greptime_v_1_health_check_client:health_check(Ctx, Request, #{channel => Channel}),
     case Reply of
         {ok, Resp, _} ->
             {reply, {ok, Resp}, State};
@@ -75,14 +87,15 @@ terminate(Reason, #state{channel = Channel} = State) ->
 %%% Public functions
 %%%===================================================================
 handle(Pid, Request) ->
-    gen_server:call(Pid, {handle, Request}).
+    gen_server:call(Pid, {handle, Request}, ?CALL_TIMEOUT).
 
 health_check(Pid) ->
-    gen_server:call(Pid, health_check).
+    gen_server:call(Pid, health_check, ?HEALTH_CHECK_TIMEOUT).
 
 stream(Pid) ->
-    {ok, Channel} = gen_server:call(Pid, channel),
-    greptime_v_1_greptime_database_client:handle_requests(#{channel => Channel}).
+    {ok, Channel} = gen_server:call(Pid, channel, ?CALL_TIMEOUT),
+    Ctx = ctx:with_deadline_after(?REQUEST_TIMEOUT, millisecond),
+    greptime_v_1_greptime_database_client:handle_requests(Ctx, #{channel => Channel}).
 
 ddl() ->
     todo.
diff --git a/test/greptimedb_SUITE.erl b/test/greptimedb_SUITE.erl
index 80a4296..60f00a4 100644
--- a/test/greptimedb_SUITE.erl
+++ b/test/greptimedb_SUITE.erl
@@ -6,7 +6,7 @@
 -include_lib("eunit/include/eunit.hrl").
 
 all() ->
-    [t_write, t_write_stream, t_insert_requests, t_write_batch, t_bench_perf].
+    [t_write, t_write_stream, t_insert_requests, t_write_batch, t_bench_perf, t_auth_error].
 
 %%[t_bench_perf].
 %%[t_insert_requests, t_bench_perf].
@@ -131,6 +131,33 @@ t_write(_) ->
     greptimedb:stop_client(Client),
     ok.
 
+t_auth_error(_) ->
+    Metric = <<"temperatures">>,
+    Points =
+        [#{fields => #{<<"temperature">> => 1},
+           tags =>
+               #{<<"from">> => <<"mqttx_4b963a8e">>,
+                 <<"host">> => <<"serverA">>,
+                 <<"qos">> => greptimedb_values:int64_value(0),
+                 <<"region">> => <<"hangzhou">>},
+           timestamp => 1619775142098},
+         #{fields => #{<<"temperature">> => 2},
+           tags =>
+               #{<<"from">> => <<"mqttx_4b963a8e">>,
+                 <<"host">> => <<"serverB">>,
+                 <<"qos">> => greptimedb_values:int64_value(1),
+                 <<"region">> => <<"ningbo">>,
+                 <<"to">> => <<"kafka">>},
+           timestamp => 1619775143098}],
+    Options =
+        [{endpoints, [{http, "localhost", 4001}]},
+         {pool, greptimedb_client_pool},
+         {pool_size, 5},
+         {pool_type, random},
+         {auth, {basic, #{username => <<"greptime_user">>, password => <<"wrong_pwd">>}}}],
+    {ok, Client} = greptimedb:start_client(Options),
+    {error, {unauth, _, _}} = greptimedb:write(Client, Metric, Points).
+
 t_write_stream(_) ->
     Options =
         [{endpoints, [{http, "localhost", 4001}]},