How to Resolve Token Issues with RTK Query in Next.js Applications

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The Problem: Token Management Breakdown

Many developers have adopted RTK Query due to its simplicity and powerful features. However, when switching to RTK Query for API interactions—potentially replacing established patterns like useContext—you might face all sorts of challenges. Some common symptoms include:

401 Response Status: The token might be set in cookies, but the server still returns an unauthorized response.

Data Retrieval Issues: You may notice that user profiles or details fail to load after standard operations, affecting navigation in protected routes.

Middleware Problems: Verifying the token with middleware may not work as anticipated, leading to unexpected access granted to protected routes and improper data handling.

For instance, problems can arise when attempting to log in or sign up users. While the logic correctly stores the token in cookies, the application fails to recognize the user’s authenticated state, leading to multiple frustrating outcomes.

The Solution: How to Store Tokens Effectively

After facing these challenges and deciphering what went wrong, one effective solution surfaced: Include credentials: 'include' in your base query configuration. This detail ensures that cookies are sent with requests, thus allowing your token to be recognized during API calls.

Step-by-Step Guide

Update Your Base Query: Modify your baseQuery to include the following parameters:

[[See Video to Reveal this Text or Code Snippet]]

This adjustment instructs the browser to include cookies in requests sent to your server.

Utilize Async/Wait Functions: Ensure your queries and mutations are set up with async and await to handle promises effectively. This change can help in managing the flow of data and responses more predictably.

Implementing the Changes

To provide context for developers adjusting their authentication logic, incorporating the changes should look similar to this in your Redux slice:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion