diff --git a/api/BaseResponse.go b/api/BaseResponse.go
index 516ada9..2444442 100644
--- a/api/BaseResponse.go
+++ b/api/BaseResponse.go
@@ -2,14 +2,14 @@ package api
 
 import "github.com/gin-gonic/gin"
 
-func errorResponse(err error, msg string) gin.H {
+func ErrorResponse(err error, msg string) gin.H {
 	return gin.H{
 		"error":   err.Error(),
 		"message": msg,
 	}
 }
 
-func validResponse(data interface{}, msg string) gin.H {
+func ValidResponse(data interface{}, msg string) gin.H {
 	return gin.H{
 		"message": msg,
 		"data":    data,
diff --git a/api/test/main_test.go b/api/test/main_test.go
new file mode 100644
index 0000000..02b32a2
--- /dev/null
+++ b/api/test/main_test.go
@@ -0,0 +1,32 @@
+package api_test
+
+import (
+	"os"
+	"testing"
+	"time"
+
+	api "git.nochill.in/nochill/hiling_go/api"
+	db "git.nochill.in/nochill/hiling_go/db/sqlc"
+	"git.nochill.in/nochill/hiling_go/util"
+	"github.com/gin-gonic/gin"
+	_ "github.com/lib/pq"
+	"github.com/stretchr/testify/require"
+)
+
+func newTestServer(t *testing.T, store db.Store) *api.Server {
+	config := util.Config{
+		TokenSymmetricKey: util.RandomString(32),
+		TokenDuration:     time.Minute,
+	}
+
+	server, err := api.NewServer(config, store)
+	require.NoError(t, err)
+
+	return server
+}
+
+func TestMain(m *testing.M) {
+	gin.SetMode(gin.TestMode)
+
+	os.Exit(m.Run())
+}
diff --git a/api/test/user_test.go b/api/test/user_test.go
new file mode 100644
index 0000000..81689c2
--- /dev/null
+++ b/api/test/user_test.go
@@ -0,0 +1,60 @@
+package api_test
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	mockdb "git.nochill.in/nochill/hiling_go/db/mock"
+	db "git.nochill.in/nochill/hiling_go/db/sqlc"
+	"git.nochill.in/nochill/hiling_go/util"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/mock/gomock"
+)
+
+func TestSignupAPI(t *testing.T) {
+	user, pass := createUser(t)
+	t.Run("OK", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+
+		store := mockdb.NewMockStore(ctrl)
+		store.EXPECT().
+			CreateUser(gomock.Any(), gomock.Any()).
+			Times(1).
+			Return(user, nil)
+
+		server := newTestServer(t, store)
+		recorder := httptest.NewRecorder()
+
+		data, err := json.Marshal(gin.H{
+			"username": user.Username,
+			"password": pass,
+		})
+		require.NoError(t, err)
+
+		url := "/user/signup"
+		request, err := http.NewRequest(http.MethodPost, url, bytes.NewReader(data))
+		require.NoError(t, err)
+
+		server.Router.ServeHTTP(recorder, request)
+		require.Equal(t, http.StatusOK, recorder.Code)
+
+	})
+}
+
+func createUser(t *testing.T) (user db.User, password string) {
+	passw := util.RandomString(10)
+	hashedPassword, err := util.HashPassword(passw)
+	require.NoError(t, err)
+
+	user = db.User{
+		Username: util.RandomString(10),
+		Password: hashedPassword,
+	}
+
+	return
+}
diff --git a/db/mock/store.go b/db/mock/store.go
new file mode 100644
index 0000000..8bc1c5d
--- /dev/null
+++ b/db/mock/store.go
@@ -0,0 +1,80 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: git.nochill.in/nochill/hiling_go/db/sqlc (interfaces: Store)
+
+// Package mockdb is a generated GoMock package.
+package mockdb
+
+import (
+	context "context"
+	reflect "reflect"
+
+	db "git.nochill.in/nochill/hiling_go/db/sqlc"
+	gomock "go.uber.org/mock/gomock"
+)
+
+// MockStore is a mock of Store interface.
+type MockStore struct {
+	ctrl     *gomock.Controller
+	recorder *MockStoreMockRecorder
+}
+
+// MockStoreMockRecorder is the mock recorder for MockStore.
+type MockStoreMockRecorder struct {
+	mock *MockStore
+}
+
+// NewMockStore creates a new mock instance.
+func NewMockStore(ctrl *gomock.Controller) *MockStore {
+	mock := &MockStore{ctrl: ctrl}
+	mock.recorder = &MockStoreMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockStore) EXPECT() *MockStoreMockRecorder {
+	return m.recorder
+}
+
+// CreateUser mocks base method.
+func (m *MockStore) CreateUser(arg0 context.Context, arg1 db.CreateUserParams) (db.User, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CreateUser", arg0, arg1)
+	ret0, _ := ret[0].(db.User)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// CreateUser indicates an expected call of CreateUser.
+func (mr *MockStoreMockRecorder) CreateUser(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateUser", reflect.TypeOf((*MockStore)(nil).CreateUser), arg0, arg1)
+}
+
+// UpdatePassword mocks base method.
+func (m *MockStore) UpdatePassword(arg0 context.Context, arg1 db.UpdatePasswordParams) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "UpdatePassword", arg0, arg1)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// UpdatePassword indicates an expected call of UpdatePassword.
+func (mr *MockStoreMockRecorder) UpdatePassword(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "UpdatePassword", reflect.TypeOf((*MockStore)(nil).UpdatePassword), arg0, arg1)
+}
+
+// UpdateUser mocks base method.
+func (m *MockStore) UpdateUser(arg0 context.Context, arg1 db.UpdateUserParams) (db.User, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "UpdateUser", arg0, arg1)
+	ret0, _ := ret[0].(db.User)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// UpdateUser indicates an expected call of UpdateUser.
+func (mr *MockStoreMockRecorder) UpdateUser(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "UpdateUser", reflect.TypeOf((*MockStore)(nil).UpdateUser), arg0, arg1)
+}
diff --git a/db/sqlc/test/main_test.go b/db/sqlc/test/main_test.go
new file mode 100644
index 0000000..f360d97
--- /dev/null
+++ b/db/sqlc/test/main_test.go
@@ -0,0 +1,32 @@
+package db_test
+
+import (
+	"database/sql"
+	"log"
+	"os"
+	"testing"
+
+	db "git.nochill.in/nochill/hiling_go/db/sqlc"
+	"git.nochill.in/nochill/hiling_go/util"
+	_ "github.com/lib/pq"
+)
+
+var testQueries *db.Queries
+var testDB *sql.DB
+
+func TestMain(m *testing.M) {
+	var err error
+	config, err := util.LoadConfig("../../..")
+	if err != nil {
+		log.Fatal("cannot load config: ", err)
+	}
+
+	testDB, err = sql.Open(config.DBDriver, config.DBSourceTest)
+	if err != nil {
+		log.Fatal("cannot connect db: ", err)
+	}
+
+	testQueries = db.New(testDB)
+
+	os.Exit(m.Run())
+}
diff --git a/db/sqlc/test/users_test.go b/db/sqlc/test/users_test.go
new file mode 100644
index 0000000..c5fc044
--- /dev/null
+++ b/db/sqlc/test/users_test.go
@@ -0,0 +1,23 @@
+package db_test
+
+import (
+	"context"
+	"testing"
+
+	db "git.nochill.in/nochill/hiling_go/db/sqlc"
+	"git.nochill.in/nochill/hiling_go/util"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCreateUser(t *testing.T) {
+	arg := db.CreateUserParams{
+		Username: util.RandomString(10),
+		Password: util.RandomString(10),
+	}
+
+	user, err := testQueries.CreateUser(context.Background(), arg)
+
+	require.NoError(t, err)
+	require.Equal(t, user.Username, arg.Username)
+	require.Equal(t, user.Password, arg.Password)
+}
diff --git a/go.mod b/go.mod
index 1b552d4..d190f2e 100644
--- a/go.mod
+++ b/go.mod
@@ -45,6 +45,7 @@ require (
 	github.com/subosito/gotenv v1.4.2 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.11 // indirect
+	go.uber.org/mock v0.2.0 // indirect
 	golang.org/x/arch v0.5.0 // indirect
 	golang.org/x/crypto v0.13.0 // indirect
 	golang.org/x/net v0.15.0 // indirect
diff --git a/go.sum b/go.sum
index 9296814..8d63038 100644
--- a/go.sum
+++ b/go.sum
@@ -241,6 +241,8 @@ go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
+go.uber.org/mock v0.2.0 h1:TaP3xedm7JaAgScZO7tlvlKrqT0p7I6OsdGB5YNSMDU=
+go.uber.org/mock v0.2.0/go.mod h1:J0y0rp9L3xiff1+ZBfKxlC1fz2+aO16tw0tsDOixfuM=
 golang.org/x/arch v0.0.0-20210923205945-b76863e36670/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
 golang.org/x/arch v0.5.0 h1:jpGode6huXQxcskEIpOCvrU+tzo81b6+oFLUYXWtH/Y=
 golang.org/x/arch v0.5.0/go.mod h1:5om86z9Hs0C8fWVUuoMHwpExlXzs5Tkyp9hOrfG7pp8=
diff --git a/notes b/notes
index 6bcbc59..00c8bea 100644
--- a/notes
+++ b/notes
@@ -32,4 +32,15 @@ ex: select message where commented_id = ... and where comment_type = (stories, r
 https://en.wikipedia.org/wiki/Provinces_of_Indonesia
 
 
+##########################################################################################
+
+
+
+######################### CUSTOM GIN VALIDATION ERR MESSAGE ##############################
+
+make custom err message, and get all the type, the err message sucks now
+https://github.com/gin-gonic/gin/issues/430 (using middleware)
+tbh i'd raher use like a wrapper instead of middleware but we'll see 
+
+
 ##########################################################################################
\ No newline at end of file