[feature] migrate to monorepo

backend/internal/auth/auth.go

@@ -0,0 +1,6 @@
+package auth
+
+// Constants for auth-related context keys
+const (
+	UserIDKey = "user_id"
+)

backend/internal/auth/auth_test.go

@@ -0,0 +1,27 @@
+package auth
+
+import (
+	"context"
+	"testing"
+)
+
+func TestUserIDKey(t *testing.T) {
+	// Test that the UserIDKey constant is defined correctly
+	if UserIDKey != "user_id" {
+		t.Errorf("UserIDKey = %v, want %v", UserIDKey, "user_id")
+	}
+
+	// Test context with user ID
+	ctx := context.WithValue(context.Background(), UserIDKey, "test-user-123")
+	value := ctx.Value(UserIDKey)
+	if value != "test-user-123" {
+		t.Errorf("Context value = %v, want %v", value, "test-user-123")
+	}
+
+	// Test context without user ID
+	emptyCtx := context.Background()
+	emptyValue := emptyCtx.Value(UserIDKey)
+	if emptyValue != nil {
+		t.Errorf("Empty context value = %v, want nil", emptyValue)
+	}
+}