diff --git a/api/v1/jwt.go b/api/v1/jwt.go
index a1b77b6..da2a643 100644
--- a/api/v1/jwt.go
+++ b/api/v1/jwt.go
@@ -17,7 +17,7 @@ import (
 const (
 	// The key name used to store user id in the context
 	// user id is extracted from the jwt token subject field.
-	UserIDContextKey = "user-id"
+	userIDContextKey = "user-id"
 )
 
 func extractTokenFromHeader(c echo.Context) (string, error) {
@@ -122,7 +122,7 @@ func JWTMiddleware(s *APIV1Service, next echo.HandlerFunc, secret string) echo.H
 		}
 
 		// Stores userID into context.
-		c.Set(UserIDContextKey, userID)
+		c.Set(userIDContextKey, userID)
 		return next(c)
 	}
 }
diff --git a/api/v1/redirector.go b/api/v1/redirector.go
index ce659dd..829ab3c 100644
--- a/api/v1/redirector.go
+++ b/api/v1/redirector.go
@@ -32,7 +32,7 @@ func (s *APIV1Service) registerRedirectorRoutes(g *echo.Group) {
 			return echo.NewHTTPError(http.StatusNotFound, fmt.Sprintf("not found shortcut with name: %s", shortcutName))
 		}
 		if shortcut.Visibility != storepb.Visibility_PUBLIC {
-			userID, ok := c.Get(UserIDContextKey).(int32)
+			userID, ok := c.Get(userIDContextKey).(int32)
 			if !ok {
 				return echo.NewHTTPError(http.StatusUnauthorized, "Unauthorized")
 			}
diff --git a/api/v1/shortcut.go b/api/v1/shortcut.go
index 8fe1688..564f27d 100644
--- a/api/v1/shortcut.go
+++ b/api/v1/shortcut.go
@@ -81,7 +81,7 @@ type PatchShortcutRequest struct {
 func (s *APIV1Service) registerShortcutRoutes(g *echo.Group) {
 	g.POST("/shortcut", func(c echo.Context) error {
 		ctx := c.Request().Context()
-		userID, ok := c.Get(UserIDContextKey).(int32)
+		userID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing user in session")
 		}
@@ -129,7 +129,7 @@ func (s *APIV1Service) registerShortcutRoutes(g *echo.Group) {
 		if err != nil {
 			return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("shortcut ID is not a number: %s", c.Param("shortcutId"))).SetInternal(err)
 		}
-		userID, ok := c.Get(UserIDContextKey).(int32)
+		userID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing user in session")
 		}
@@ -196,7 +196,7 @@ func (s *APIV1Service) registerShortcutRoutes(g *echo.Group) {
 
 	g.GET("/shortcut", func(c echo.Context) error {
 		ctx := c.Request().Context()
-		userID, ok := c.Get(UserIDContextKey).(int32)
+		userID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing user in session")
 		}
@@ -263,7 +263,7 @@ func (s *APIV1Service) registerShortcutRoutes(g *echo.Group) {
 		if err != nil {
 			return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("shortcut id is not a number: %s", c.Param("id"))).SetInternal(err)
 		}
-		userID, ok := c.Get(UserIDContextKey).(int32)
+		userID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing user in session")
 		}
diff --git a/api/v1/user.go b/api/v1/user.go
index a0ae3b8..4d6101f 100644
--- a/api/v1/user.go
+++ b/api/v1/user.go
@@ -83,7 +83,7 @@ type PatchUserRequest struct {
 func (s *APIV1Service) registerUserRoutes(g *echo.Group) {
 	g.POST("/user", func(c echo.Context) error {
 		ctx := c.Request().Context()
-		userID, ok := c.Get(UserIDContextKey).(int32)
+		userID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "Missing auth session")
 		}
@@ -144,7 +144,7 @@ func (s *APIV1Service) registerUserRoutes(g *echo.Group) {
 	// GET /api/user/me is used to check if the user is logged in.
 	g.GET("/user/me", func(c echo.Context) error {
 		ctx := c.Request().Context()
-		userID, ok := c.Get(UserIDContextKey).(int32)
+		userID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing auth session")
 		}
@@ -182,7 +182,7 @@ func (s *APIV1Service) registerUserRoutes(g *echo.Group) {
 		if err != nil {
 			return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("user id is not a number: %s", c.Param("id"))).SetInternal(err)
 		}
-		currentUserID, ok := c.Get(UserIDContextKey).(int32)
+		currentUserID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing user in session")
 		}
@@ -254,7 +254,7 @@ func (s *APIV1Service) registerUserRoutes(g *echo.Group) {
 
 	g.DELETE("/user/:id", func(c echo.Context) error {
 		ctx := c.Request().Context()
-		currentUserID, ok := c.Get(UserIDContextKey).(int32)
+		currentUserID, ok := c.Get(userIDContextKey).(int32)
 		if !ok {
 			return echo.NewHTTPError(http.StatusUnauthorized, "missing user in session")
 		}
diff --git a/api/v2/acl.go b/api/v2/acl.go
index 030be4e..4eaee30 100644
--- a/api/v2/acl.go
+++ b/api/v2/acl.go
@@ -23,7 +23,7 @@ type ContextKey int
 const (
 	// The key name used to store user id in the context
 	// user id is extracted from the jwt token subject field.
-	UserIDContextKey ContextKey = iota
+	userIDContextKey ContextKey = iota
 )
 
 // GRPCAuthInterceptor is the auth interceptor for gRPC server.
@@ -80,7 +80,7 @@ func (in *GRPCAuthInterceptor) AuthenticationInterceptor(ctx context.Context, re
 	}
 
 	// Stores userID into context.
-	childCtx := context.WithValue(ctx, UserIDContextKey, userID)
+	childCtx := context.WithValue(ctx, userIDContextKey, userID)
 	return handler(childCtx, request)
 }
 
diff --git a/api/v2/shortcut_service.go b/api/v2/shortcut_service.go
index 7365ca0..39481f3 100644
--- a/api/v2/shortcut_service.go
+++ b/api/v2/shortcut_service.go
@@ -28,7 +28,7 @@ func NewShortcutService(secret string, store *store.Store) *ShortcutService {
 }
 
 func (s *ShortcutService) ListShortcuts(ctx context.Context, _ *apiv2pb.ListShortcutsRequest) (*apiv2pb.ListShortcutsResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	find := &store.FindShortcut{}
 	find.VisibilityList = []store.Visibility{store.VisibilityWorkspace, store.VisibilityPublic}
 	visibleShortcutList, err := s.Store.ListShortcuts(ctx, find)
@@ -66,7 +66,7 @@ func (s *ShortcutService) GetShortcut(ctx context.Context, request *apiv2pb.GetS
 		return nil, status.Errorf(codes.NotFound, "shortcut not found")
 	}
 
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	if shortcut.Visibility == storepb.Visibility_PRIVATE && shortcut.CreatorId != userID {
 		return nil, status.Errorf(codes.PermissionDenied, "Permission denied")
 	}
@@ -78,7 +78,7 @@ func (s *ShortcutService) GetShortcut(ctx context.Context, request *apiv2pb.GetS
 }
 
 func (s *ShortcutService) CreateShortcut(ctx context.Context, request *apiv2pb.CreateShortcutRequest) (*apiv2pb.CreateShortcutResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	shortcut := &storepb.Shortcut{
 		CreatorId:   userID,
 		Name:        request.Shortcut.Name,
@@ -111,7 +111,7 @@ func (s *ShortcutService) CreateShortcut(ctx context.Context, request *apiv2pb.C
 }
 
 func (s *ShortcutService) DeleteShortcut(ctx context.Context, request *apiv2pb.DeleteShortcutRequest) (*apiv2pb.DeleteShortcutResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	currentUser, err := s.Store.GetUser(ctx, &store.FindUser{
 		ID: &userID,
 	})
diff --git a/api/v2/user_service.go b/api/v2/user_service.go
index 5f6c032..1896395 100644
--- a/api/v2/user_service.go
+++ b/api/v2/user_service.go
@@ -87,7 +87,7 @@ func (s *UserService) CreateUser(ctx context.Context, request *apiv2pb.CreateUse
 }
 
 func (s *UserService) UpdateUser(ctx context.Context, request *apiv2pb.UpdateUserRequest) (*apiv2pb.UpdateUserResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	if userID != request.User.Id {
 		return nil, status.Errorf(codes.PermissionDenied, "Permission denied")
 	}
@@ -115,7 +115,7 @@ func (s *UserService) UpdateUser(ctx context.Context, request *apiv2pb.UpdateUse
 }
 
 func (s *UserService) DeleteUser(ctx context.Context, request *apiv2pb.DeleteUserRequest) (*apiv2pb.DeleteUserResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	if userID == request.Id {
 		return nil, status.Errorf(codes.InvalidArgument, "cannot delete yourself")
 	}
@@ -131,7 +131,7 @@ func (s *UserService) DeleteUser(ctx context.Context, request *apiv2pb.DeleteUse
 }
 
 func (s *UserService) ListUserAccessTokens(ctx context.Context, request *apiv2pb.ListUserAccessTokensRequest) (*apiv2pb.ListUserAccessTokensResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	if userID != request.Id {
 		return nil, status.Errorf(codes.PermissionDenied, "Permission denied")
 	}
@@ -182,7 +182,7 @@ func (s *UserService) ListUserAccessTokens(ctx context.Context, request *apiv2pb
 }
 
 func (s *UserService) CreateUserAccessToken(ctx context.Context, request *apiv2pb.CreateUserAccessTokenRequest) (*apiv2pb.CreateUserAccessTokenResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	if userID != request.Id {
 		return nil, status.Errorf(codes.PermissionDenied, "Permission denied")
 	}
@@ -238,7 +238,7 @@ func (s *UserService) CreateUserAccessToken(ctx context.Context, request *apiv2p
 }
 
 func (s *UserService) DeleteUserAccessToken(ctx context.Context, request *apiv2pb.DeleteUserAccessTokenRequest) (*apiv2pb.DeleteUserAccessTokenResponse, error) {
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	if userID != request.Id {
 		return nil, status.Errorf(codes.PermissionDenied, "Permission denied")
 	}
diff --git a/api/v2/user_setting_service.go b/api/v2/user_setting_service.go
index 3d5bb4b..0a7dad9 100644
--- a/api/v2/user_setting_service.go
+++ b/api/v2/user_setting_service.go
@@ -39,7 +39,7 @@ func (s *UserSettingService) UpdateUserSetting(ctx context.Context, request *api
 		return nil, status.Errorf(codes.InvalidArgument, "update mask is empty")
 	}
 
-	userID := ctx.Value(UserIDContextKey).(int32)
+	userID := ctx.Value(userIDContextKey).(int32)
 	for _, path := range request.UpdateMask {
 		if path == "locale" {
 			if _, err := s.Store.UpsertUserSetting(ctx, &storepb.UserSetting{