Register users by invoking the user service create method with request body, fix circular dependencies via the os model, and verify a generated id in the api users list.

Generate a jwt, sign it, include the user id in the payload, and send it via an HttpOnly cookie for authentication.

Implement a logout function that clears the cookie and JWT via a post request, returning a success message, and fix internal server error with an old guard.

Share the JWT service across controllers by creating a common model, importing and exporting it through a common module, and verify access by logging in to retrieve user data.

Learn to implement a many-to-one relationship between users and roles using foreign keys, a join column, and role IDs, including creating roles and assigning them to users.

Add a post /export endpoint to export orders as a csv file. Assemble orders and order items into a csv, set content-type and attachment headers, and return the downloadable file.

Install and initialize a new React app named react admin using the TypeScript template, then start the dev server on port 3000.

Use React hooks with useState to manage a zero-initialized count, update it via setCount from a number input, and render changes to illustrate immutable state and glass components.

Clean up the login form by removing unused fields, implement React state for email and password, submit via axios to the login API, enable cookies, and redirect on success.

Display the authenticated user’s name in the navigation by converting to a function component, fetch the user with axios inside useEffect, and handle credentials after login.

Implement image upload in a React and NestJS app by adding an image input, handling change events, creating form data, posting to the upload endpoint, and displaying the uploaded image.

Build a React orders component that fetches data with axios, renders a paginated table of orders and their items, defines order and order item models, and enables view interactions.

Learn to implement click-driven animations in a React app by toggling item visibility with a view button, using height transitions, max height, and overflow hidden, managed by a select state.

Implement an export button that posts to the backend, retrieves a csv blob, and downloads orders.csv by creating a blob URL and link.