diff --git a/api/memo.go b/api/memo.go
index c86323d7..c9ac227f 100644
--- a/api/memo.go
+++ b/api/memo.go
@@ -21,6 +21,7 @@ type MemoPatch struct {
 
 	Content   *string `json:"content"`
 	RowStatus *string `json:"rowStatus"`
+	CreatedTs *int64  `json:"createdTs"`
 }
 
 type MemoFind struct {
diff --git a/common/error.go b/common/error.go
index d96277d6..ef792ed4 100644
--- a/common/error.go
+++ b/common/error.go
@@ -22,29 +22,6 @@ const (
 	DbConnectionFailure    Code = 101
 	DbStatementSyntaxError Code = 102
 	DbExecutionError       Code = 103
-
-	// 201 db migration error
-	// Db migration is a core feature, so we separate it from the db error
-	MigrationSchemaMissing   Code = 201
-	MigrationAlreadyApplied  Code = 202
-	MigrationOutOfOrder      Code = 203
-	MigrationBaselineMissing Code = 204
-
-	// 301 task error
-	TaskTimingNotAllowed Code = 301
-
-	// 10001 advisor error code
-	CompatibilityDropDatabase  Code = 10001
-	CompatibilityRenameTable   Code = 10002
-	CompatibilityDropTable     Code = 10003
-	CompatibilityRenameColumn  Code = 10004
-	CompatibilityDropColumn    Code = 10005
-	CompatibilityAddPrimaryKey Code = 10006
-	CompatibilityAddUniqueKey  Code = 10007
-	CompatibilityAddForeignKey Code = 10008
-	CompatibilityAddCheck      Code = 10009
-	CompatibilityAlterCheck    Code = 10010
-	CompatibilityAlterColumn   Code = 10011
 )
 
 // Error represents an application-specific error. Application errors can be
diff --git a/server/auth.go b/server/auth.go
index 466779be..63ffb609 100644
--- a/server/auth.go
+++ b/server/auth.go
@@ -23,10 +23,10 @@ func (s *Server) registerAuthRoutes(g *echo.Group) {
 		}
 		user, err := s.UserService.FindUser(userFind)
 		if err != nil {
-			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to authenticate user").SetInternal(err)
+			return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to find user by name %s", login.Name)).SetInternal(err)
 		}
 		if user == nil {
-			return echo.NewHTTPError(http.StatusUnauthorized, fmt.Sprintf("User not found: %s", login.Name))
+			return echo.NewHTTPError(http.StatusUnauthorized, fmt.Sprintf("User not found with name %s", login.Name))
 		}
 
 		// Compare the stored hashed password, with the hashed version of the password that was received.
@@ -35,8 +35,7 @@ func (s *Server) registerAuthRoutes(g *echo.Group) {
 			return echo.NewHTTPError(http.StatusUnauthorized, "Incorrect password").SetInternal(err)
 		}
 
-		err = setUserSession(c, user)
-		if err != nil {
+		if err = setUserSession(c, user); err != nil {
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to set login session").SetInternal(err)
 		}
 
@@ -64,10 +63,12 @@ func (s *Server) registerAuthRoutes(g *echo.Group) {
 			return echo.NewHTTPError(http.StatusBadRequest, "Malformatted signup request").SetInternal(err)
 		}
 
-		if len(signup.Name) <= 5 {
+		// Validate signup form.
+		// We can do stricter checks later.
+		if len(signup.Name) < 6 {
 			return echo.NewHTTPError(http.StatusBadRequest, "Username is too short, minimum length is 6.")
 		}
-		if len(signup.Password) <= 5 {
+		if len(signup.Password) < 6 {
 			return echo.NewHTTPError(http.StatusBadRequest, "Password is too short, minimum length is 6.")
 		}
 
@@ -76,10 +77,10 @@ func (s *Server) registerAuthRoutes(g *echo.Group) {
 		}
 		user, err := s.UserService.FindUser(userFind)
 		if err != nil {
-			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to authenticate user").SetInternal(err)
+			return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("Failed to find user by name %s", signup.Name)).SetInternal(err)
 		}
 		if user != nil {
-			return echo.NewHTTPError(http.StatusUnauthorized, fmt.Sprintf("Existed user found: %s", signup.Name))
+			return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Existed user found: %s", signup.Name))
 		}
 
 		passwordHash, err := bcrypt.GenerateFromPassword([]byte(signup.Password), bcrypt.DefaultCost)
diff --git a/server/memo.go b/server/memo.go
index b8d33aee..6284c4f5 100644
--- a/server/memo.go
+++ b/server/memo.go
@@ -65,17 +65,11 @@ func (s *Server) registerMemoRoutes(g *echo.Group) {
 		memoFind := &api.MemoFind{
 			CreatorId: &userId,
 		}
-		showHiddenMemo, err := strconv.ParseBool(c.QueryParam("hidden"))
-		if err != nil {
-			showHiddenMemo = false
+		rowStatus := c.QueryParam("rowStatus")
+		if rowStatus != "" {
+			memoFind.RowStatus = &rowStatus
 		}
 
-		rowStatus := "NORMAL"
-		if showHiddenMemo {
-			rowStatus = "HIDDEN"
-		}
-		memoFind.RowStatus = &rowStatus
-
 		list, err := s.MemoService.FindMemoList(memoFind)
 		if err != nil {
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to fetch memo list").SetInternal(err)
diff --git a/server/webhook.go b/server/webhook.go
index 72504385..fb944cb8 100644
--- a/server/webhook.go
+++ b/server/webhook.go
@@ -66,17 +66,11 @@ func (s *Server) registerWebhookRoutes(g *echo.Group) {
 		memoFind := &api.MemoFind{
 			CreatorId: &user.Id,
 		}
-		showHiddenMemo, err := strconv.ParseBool(c.QueryParam("hidden"))
-		if err != nil {
-			showHiddenMemo = false
+		rowStatus := c.QueryParam("rowStatus")
+		if rowStatus != "" {
+			memoFind.RowStatus = &rowStatus
 		}
 
-		rowStatus := "NORMAL"
-		if showHiddenMemo {
-			rowStatus = "HIDDEN"
-		}
-		memoFind.RowStatus = &rowStatus
-
 		list, err := s.MemoService.FindMemoList(memoFind)
 		if err != nil {
 			return echo.NewHTTPError(http.StatusInternalServerError, "Failed to fetch memo list").SetInternal(err)
diff --git a/store/memo.go b/store/memo.go
index ebf61501..6164914e 100644
--- a/store/memo.go
+++ b/store/memo.go
@@ -109,6 +109,9 @@ func patchMemo(db *DB, patch *api.MemoPatch) (*api.Memo, error) {
 	if v := patch.RowStatus; v != nil {
 		set, args = append(set, "row_status = ?"), append(args, *v)
 	}
+	if v := patch.CreatedTs; v != nil {
+		set, args = append(set, "created_ts = ?"), append(args, *v)
+	}
 
 	args = append(args, patch.Id)
 
diff --git a/web/src/helpers/api.ts b/web/src/helpers/api.ts
index e75946d6..f9baf5cd 100644
--- a/web/src/helpers/api.ts
+++ b/web/src/helpers/api.ts
@@ -113,14 +113,14 @@ namespace api {
   export function getMyMemos() {
     return request<Model.Memo[]>({
       method: "GET",
-      url: "/api/memo",
+      url: "/api/memo?rowStatus=NORMAL",
     });
   }
 
   export function getMyDeletedMemos() {
     return request<Model.Memo[]>({
       method: "GET",
-      url: "/api/memo?hidden=true",
+      url: "/api/memo?rowStatus=HIDDEN",
     });
   }