diff --git a/Makefile b/Makefile
index 384c887..8cfc44c 100644
--- a/Makefile
+++ b/Makefile
@@ -34,4 +34,9 @@ dbdocs:
 mock:
 	mockgen -package mockdb -destination db/mock/store.go github.com/cukhoaimon/SimpleBank/db/sqlc Store
 
-.PHONY: postgres createdb dropdb migrate-up migrate-down sqlc test server mock dbdocs
\ No newline at end of file
+proto:
+	protoc --proto_path=proto --go_out=pb --go_opt=paths=source_relative \
+	--go-grpc_out=pb --go-grpc_opt=paths=source_relative \
+	proto/*.proto
+
+.PHONY: postgres createdb dropdb migrate-up migrate-down sqlc test server mock dbdocs proto
\ No newline at end of file
diff --git a/pb/rpc_create_user.pb.go b/pb/rpc_create_user.pb.go
new file mode 100644
index 0000000..7f4a713
--- /dev/null
+++ b/pb/rpc_create_user.pb.go
@@ -0,0 +1,240 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.1
+// 	protoc        v4.25.2
+// source: rpc_create_user.proto
+
+package pb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type CreateUserRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Username string `protobuf:"bytes,1,opt,name=username,proto3" json:"username,omitempty"`
+	FullName string `protobuf:"bytes,2,opt,name=full_name,json=fullName,proto3" json:"full_name,omitempty"`
+	Email    string `protobuf:"bytes,3,opt,name=email,proto3" json:"email,omitempty"`
+	Password string `protobuf:"bytes,4,opt,name=password,proto3" json:"password,omitempty"`
+}
+
+func (x *CreateUserRequest) Reset() {
+	*x = CreateUserRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_rpc_create_user_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateUserRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateUserRequest) ProtoMessage() {}
+
+func (x *CreateUserRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_rpc_create_user_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateUserRequest.ProtoReflect.Descriptor instead.
+func (*CreateUserRequest) Descriptor() ([]byte, []int) {
+	return file_rpc_create_user_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *CreateUserRequest) GetUsername() string {
+	if x != nil {
+		return x.Username
+	}
+	return ""
+}
+
+func (x *CreateUserRequest) GetFullName() string {
+	if x != nil {
+		return x.FullName
+	}
+	return ""
+}
+
+func (x *CreateUserRequest) GetEmail() string {
+	if x != nil {
+		return x.Email
+	}
+	return ""
+}
+
+func (x *CreateUserRequest) GetPassword() string {
+	if x != nil {
+		return x.Password
+	}
+	return ""
+}
+
+type CreateUserResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	User *User `protobuf:"bytes,1,opt,name=user,proto3" json:"user,omitempty"`
+}
+
+func (x *CreateUserResponse) Reset() {
+	*x = CreateUserResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_rpc_create_user_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateUserResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateUserResponse) ProtoMessage() {}
+
+func (x *CreateUserResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_rpc_create_user_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateUserResponse.ProtoReflect.Descriptor instead.
+func (*CreateUserResponse) Descriptor() ([]byte, []int) {
+	return file_rpc_create_user_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *CreateUserResponse) GetUser() *User {
+	if x != nil {
+		return x.User
+	}
+	return nil
+}
+
+var File_rpc_create_user_proto protoreflect.FileDescriptor
+
+var file_rpc_create_user_proto_rawDesc = []byte{
+	0x0a, 0x15, 0x72, 0x70, 0x63, 0x5f, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65, 0x5f, 0x75, 0x73, 0x65,
+	0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x02, 0x64, 0x62, 0x1a, 0x0a, 0x75, 0x73, 0x65,
+	0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x7e, 0x0a, 0x11, 0x43, 0x72, 0x65, 0x61, 0x74,
+	0x65, 0x55, 0x73, 0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x1a, 0x0a, 0x08,
+	0x75, 0x73, 0x65, 0x72, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08,
+	0x75, 0x73, 0x65, 0x72, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x1b, 0x0a, 0x09, 0x66, 0x75, 0x6c, 0x6c,
+	0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08, 0x66, 0x75, 0x6c,
+	0x6c, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x14, 0x0a, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x18, 0x03,
+	0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x12, 0x1a, 0x0a, 0x08, 0x70,
+	0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08, 0x70,
+	0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x22, 0x32, 0x0a, 0x12, 0x43, 0x72, 0x65, 0x61, 0x74,
+	0x65, 0x55, 0x73, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x1c, 0x0a,
+	0x04, 0x75, 0x73, 0x65, 0x72, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x08, 0x2e, 0x64, 0x62,
+	0x2e, 0x55, 0x73, 0x65, 0x72, 0x52, 0x04, 0x75, 0x73, 0x65, 0x72, 0x42, 0x25, 0x5a, 0x23, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x63, 0x75, 0x6b, 0x68, 0x6f, 0x61,
+	0x69, 0x6d, 0x6f, 0x6e, 0x2f, 0x53, 0x69, 0x6d, 0x70, 0x6c, 0x65, 0x42, 0x61, 0x6e, 0x6b, 0x2f,
+	0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_rpc_create_user_proto_rawDescOnce sync.Once
+	file_rpc_create_user_proto_rawDescData = file_rpc_create_user_proto_rawDesc
+)
+
+func file_rpc_create_user_proto_rawDescGZIP() []byte {
+	file_rpc_create_user_proto_rawDescOnce.Do(func() {
+		file_rpc_create_user_proto_rawDescData = protoimpl.X.CompressGZIP(file_rpc_create_user_proto_rawDescData)
+	})
+	return file_rpc_create_user_proto_rawDescData
+}
+
+var file_rpc_create_user_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_rpc_create_user_proto_goTypes = []interface{}{
+	(*CreateUserRequest)(nil),  // 0: db.CreateUserRequest
+	(*CreateUserResponse)(nil), // 1: db.CreateUserResponse
+	(*User)(nil),               // 2: db.User
+}
+var file_rpc_create_user_proto_depIdxs = []int32{
+	2, // 0: db.CreateUserResponse.user:type_name -> db.User
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_rpc_create_user_proto_init() }
+func file_rpc_create_user_proto_init() {
+	if File_rpc_create_user_proto != nil {
+		return
+	}
+	file_user_proto_init()
+	if !protoimpl.UnsafeEnabled {
+		file_rpc_create_user_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CreateUserRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_rpc_create_user_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CreateUserResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_rpc_create_user_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_rpc_create_user_proto_goTypes,
+		DependencyIndexes: file_rpc_create_user_proto_depIdxs,
+		MessageInfos:      file_rpc_create_user_proto_msgTypes,
+	}.Build()
+	File_rpc_create_user_proto = out.File
+	file_rpc_create_user_proto_rawDesc = nil
+	file_rpc_create_user_proto_goTypes = nil
+	file_rpc_create_user_proto_depIdxs = nil
+}
diff --git a/pb/service_simple_bank.pb.go b/pb/service_simple_bank.pb.go
new file mode 100644
index 0000000..ae1f11c
--- /dev/null
+++ b/pb/service_simple_bank.pb.go
@@ -0,0 +1,76 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.1
+// 	protoc        v4.25.2
+// source: service_simple_bank.proto
+
+package pb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+var File_service_simple_bank_proto protoreflect.FileDescriptor
+
+var file_service_simple_bank_proto_rawDesc = []byte{
+	0x0a, 0x19, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x5f, 0x73, 0x69, 0x6d, 0x70, 0x6c, 0x65,
+	0x5f, 0x62, 0x61, 0x6e, 0x6b, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x02, 0x64, 0x62, 0x1a,
+	0x15, 0x72, 0x70, 0x63, 0x5f, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65, 0x5f, 0x75, 0x73, 0x65, 0x72,
+	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x32, 0x4b, 0x0a, 0x0a, 0x53, 0x69, 0x6d, 0x70, 0x6c, 0x65,
+	0x42, 0x61, 0x6e, 0x6b, 0x12, 0x3d, 0x0a, 0x0a, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x55, 0x73,
+	0x65, 0x72, 0x12, 0x15, 0x2e, 0x64, 0x62, 0x2e, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x55, 0x73,
+	0x65, 0x72, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x16, 0x2e, 0x64, 0x62, 0x2e, 0x43,
+	0x72, 0x65, 0x61, 0x74, 0x65, 0x55, 0x73, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73,
+	0x65, 0x22, 0x00, 0x42, 0x25, 0x5a, 0x23, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f,
+	0x6d, 0x2f, 0x63, 0x75, 0x6b, 0x68, 0x6f, 0x61, 0x69, 0x6d, 0x6f, 0x6e, 0x2f, 0x53, 0x69, 0x6d,
+	0x70, 0x6c, 0x65, 0x42, 0x61, 0x6e, 0x6b, 0x2f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x33,
+}
+
+var file_service_simple_bank_proto_goTypes = []interface{}{
+	(*CreateUserRequest)(nil),  // 0: db.CreateUserRequest
+	(*CreateUserResponse)(nil), // 1: db.CreateUserResponse
+}
+var file_service_simple_bank_proto_depIdxs = []int32{
+	0, // 0: db.SimpleBank.CreateUser:input_type -> db.CreateUserRequest
+	1, // 1: db.SimpleBank.CreateUser:output_type -> db.CreateUserResponse
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_service_simple_bank_proto_init() }
+func file_service_simple_bank_proto_init() {
+	if File_service_simple_bank_proto != nil {
+		return
+	}
+	file_rpc_create_user_proto_init()
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_service_simple_bank_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   0,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_service_simple_bank_proto_goTypes,
+		DependencyIndexes: file_service_simple_bank_proto_depIdxs,
+	}.Build()
+	File_service_simple_bank_proto = out.File
+	file_service_simple_bank_proto_rawDesc = nil
+	file_service_simple_bank_proto_goTypes = nil
+	file_service_simple_bank_proto_depIdxs = nil
+}
diff --git a/pb/service_simple_bank_grpc.pb.go b/pb/service_simple_bank_grpc.pb.go
new file mode 100644
index 0000000..5adb4ec
--- /dev/null
+++ b/pb/service_simple_bank_grpc.pb.go
@@ -0,0 +1,105 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.2.0
+// - protoc             v4.25.2
+// source: service_simple_bank.proto
+
+package pb
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+// SimpleBankClient is the client API for SimpleBank service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type SimpleBankClient interface {
+	CreateUser(ctx context.Context, in *CreateUserRequest, opts ...grpc.CallOption) (*CreateUserResponse, error)
+}
+
+type simpleBankClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewSimpleBankClient(cc grpc.ClientConnInterface) SimpleBankClient {
+	return &simpleBankClient{cc}
+}
+
+func (c *simpleBankClient) CreateUser(ctx context.Context, in *CreateUserRequest, opts ...grpc.CallOption) (*CreateUserResponse, error) {
+	out := new(CreateUserResponse)
+	err := c.cc.Invoke(ctx, "/db.SimpleBank/CreateUser", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// SimpleBankServer is the server API for SimpleBank service.
+// All implementations must embed UnimplementedSimpleBankServer
+// for forward compatibility
+type SimpleBankServer interface {
+	CreateUser(context.Context, *CreateUserRequest) (*CreateUserResponse, error)
+	mustEmbedUnimplementedSimpleBankServer()
+}
+
+// UnimplementedSimpleBankServer must be embedded to have forward compatible implementations.
+type UnimplementedSimpleBankServer struct {
+}
+
+func (UnimplementedSimpleBankServer) CreateUser(context.Context, *CreateUserRequest) (*CreateUserResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CreateUser not implemented")
+}
+func (UnimplementedSimpleBankServer) mustEmbedUnimplementedSimpleBankServer() {}
+
+// UnsafeSimpleBankServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to SimpleBankServer will
+// result in compilation errors.
+type UnsafeSimpleBankServer interface {
+	mustEmbedUnimplementedSimpleBankServer()
+}
+
+func RegisterSimpleBankServer(s grpc.ServiceRegistrar, srv SimpleBankServer) {
+	s.RegisterService(&SimpleBank_ServiceDesc, srv)
+}
+
+func _SimpleBank_CreateUser_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CreateUserRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(SimpleBankServer).CreateUser(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/db.SimpleBank/CreateUser",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(SimpleBankServer).CreateUser(ctx, req.(*CreateUserRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// SimpleBank_ServiceDesc is the grpc.ServiceDesc for SimpleBank service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var SimpleBank_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "db.SimpleBank",
+	HandlerType: (*SimpleBankServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "CreateUser",
+			Handler:    _SimpleBank_CreateUser_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "service_simple_bank.proto",
+}
diff --git a/pb/user.pb.go b/pb/user.pb.go
new file mode 100644
index 0000000..d0aac59
--- /dev/null
+++ b/pb/user.pb.go
@@ -0,0 +1,192 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.1
+// 	protoc        v4.25.2
+// source: user.proto
+
+package pb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type User struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Username          string                 `protobuf:"bytes,1,opt,name=username,proto3" json:"username,omitempty"`
+	FullName          string                 `protobuf:"bytes,2,opt,name=full_name,json=fullName,proto3" json:"full_name,omitempty"`
+	Email             string                 `protobuf:"bytes,3,opt,name=email,proto3" json:"email,omitempty"`
+	PassWordChangedAt *timestamppb.Timestamp `protobuf:"bytes,4,opt,name=pass_word_changed_at,json=passWordChangedAt,proto3" json:"pass_word_changed_at,omitempty"`
+	CreatedAt         *timestamppb.Timestamp `protobuf:"bytes,5,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
+}
+
+func (x *User) Reset() {
+	*x = User{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_user_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *User) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*User) ProtoMessage() {}
+
+func (x *User) ProtoReflect() protoreflect.Message {
+	mi := &file_user_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use User.ProtoReflect.Descriptor instead.
+func (*User) Descriptor() ([]byte, []int) {
+	return file_user_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *User) GetUsername() string {
+	if x != nil {
+		return x.Username
+	}
+	return ""
+}
+
+func (x *User) GetFullName() string {
+	if x != nil {
+		return x.FullName
+	}
+	return ""
+}
+
+func (x *User) GetEmail() string {
+	if x != nil {
+		return x.Email
+	}
+	return ""
+}
+
+func (x *User) GetPassWordChangedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.PassWordChangedAt
+	}
+	return nil
+}
+
+func (x *User) GetCreatedAt() *timestamppb.Timestamp {
+	if x != nil {
+		return x.CreatedAt
+	}
+	return nil
+}
+
+var File_user_proto protoreflect.FileDescriptor
+
+var file_user_proto_rawDesc = []byte{
+	0x0a, 0x0a, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x02, 0x64, 0x62,
+	0x1a, 0x1f, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75,
+	0x66, 0x2f, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74,
+	0x6f, 0x22, 0xdd, 0x01, 0x0a, 0x04, 0x55, 0x73, 0x65, 0x72, 0x12, 0x1a, 0x0a, 0x08, 0x75, 0x73,
+	0x65, 0x72, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08, 0x75, 0x73,
+	0x65, 0x72, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x1b, 0x0a, 0x09, 0x66, 0x75, 0x6c, 0x6c, 0x5f, 0x6e,
+	0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x08, 0x66, 0x75, 0x6c, 0x6c, 0x4e,
+	0x61, 0x6d, 0x65, 0x12, 0x14, 0x0a, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x18, 0x03, 0x20, 0x01,
+	0x28, 0x09, 0x52, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x12, 0x4b, 0x0a, 0x14, 0x70, 0x61, 0x73,
+	0x73, 0x5f, 0x77, 0x6f, 0x72, 0x64, 0x5f, 0x63, 0x68, 0x61, 0x6e, 0x67, 0x65, 0x64, 0x5f, 0x61,
+	0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65,
+	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x54, 0x69, 0x6d, 0x65, 0x73, 0x74,
+	0x61, 0x6d, 0x70, 0x52, 0x11, 0x70, 0x61, 0x73, 0x73, 0x57, 0x6f, 0x72, 0x64, 0x43, 0x68, 0x61,
+	0x6e, 0x67, 0x65, 0x64, 0x41, 0x74, 0x12, 0x39, 0x0a, 0x0a, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65,
+	0x64, 0x5f, 0x61, 0x74, 0x18, 0x05, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x67, 0x6f, 0x6f,
+	0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x54, 0x69, 0x6d,
+	0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x52, 0x09, 0x63, 0x72, 0x65, 0x61, 0x74, 0x65, 0x64, 0x41,
+	0x74, 0x42, 0x25, 0x5a, 0x23, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
+	0x63, 0x75, 0x6b, 0x68, 0x6f, 0x61, 0x69, 0x6d, 0x6f, 0x6e, 0x2f, 0x53, 0x69, 0x6d, 0x70, 0x6c,
+	0x65, 0x42, 0x61, 0x6e, 0x6b, 0x2f, 0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_user_proto_rawDescOnce sync.Once
+	file_user_proto_rawDescData = file_user_proto_rawDesc
+)
+
+func file_user_proto_rawDescGZIP() []byte {
+	file_user_proto_rawDescOnce.Do(func() {
+		file_user_proto_rawDescData = protoimpl.X.CompressGZIP(file_user_proto_rawDescData)
+	})
+	return file_user_proto_rawDescData
+}
+
+var file_user_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_user_proto_goTypes = []interface{}{
+	(*User)(nil),                  // 0: db.User
+	(*timestamppb.Timestamp)(nil), // 1: google.protobuf.Timestamp
+}
+var file_user_proto_depIdxs = []int32{
+	1, // 0: db.User.pass_word_changed_at:type_name -> google.protobuf.Timestamp
+	1, // 1: db.User.created_at:type_name -> google.protobuf.Timestamp
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
+}
+
+func init() { file_user_proto_init() }
+func file_user_proto_init() {
+	if File_user_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_user_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*User); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_user_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_user_proto_goTypes,
+		DependencyIndexes: file_user_proto_depIdxs,
+		MessageInfos:      file_user_proto_msgTypes,
+	}.Build()
+	File_user_proto = out.File
+	file_user_proto_rawDesc = nil
+	file_user_proto_goTypes = nil
+	file_user_proto_depIdxs = nil
+}
diff --git a/proto/rpc_create_user.proto b/proto/rpc_create_user.proto
new file mode 100644
index 0000000..acfc02d
--- /dev/null
+++ b/proto/rpc_create_user.proto
@@ -0,0 +1,18 @@
+syntax = "proto3";
+
+package db;
+
+import "user.proto";
+
+option go_package = "github.com/cukhoaimon/SimpleBank/pb";
+
+message CreateUserRequest {
+  string username = 1;
+  string full_name = 2;
+  string email = 3;
+  string password = 4;
+}
+
+message CreateUserResponse {
+  User user = 1;
+}
\ No newline at end of file
diff --git a/proto/service_simple_bank.proto b/proto/service_simple_bank.proto
new file mode 100644
index 0000000..d79d150
--- /dev/null
+++ b/proto/service_simple_bank.proto
@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+package db;
+
+import "rpc_create_user.proto";
+
+option go_package = "github.com/cukhoaimon/SimpleBank/pb";
+
+service SimpleBank {
+  rpc CreateUser (CreateUserRequest) returns (CreateUserResponse) {}
+}
\ No newline at end of file
diff --git a/proto/user.proto b/proto/user.proto
new file mode 100644
index 0000000..4b7936b
--- /dev/null
+++ b/proto/user.proto
@@ -0,0 +1,15 @@
+syntax = "proto3";
+
+package db;
+
+import "google/protobuf/timestamp.proto";
+
+option go_package = "github.com/cukhoaimon/SimpleBank/pb";
+
+message User {
+  string username = 1;
+  string full_name = 2;
+  string email = 3;
+  google.protobuf.Timestamp pass_word_changed_at = 4;
+  google.protobuf.Timestamp created_at = 5;
+}