Node.js – JWT Authentication example with PostgreSQL example
User Registration, User Login and Authorization process.
The diagram shows flow of how we implement User Registration, User Login and Authorization process.

For more detail, please visit:
Node.js JWT Authentication & Authorization with PostgreSQL example
You may need to implement Refresh Token:

Node.js JWT Refresh Token example
Working with Front-end:
Vue.js JWT Authentication with Vuex and Vue Router
Angular 8 JWT Authentication example
Angular 10 JWT Authentication example
Angular 11 JWT Authentication example
Angular 12 JWT Authentication example
Angular 13 JWT Authentication example
React JWT Authentication & Authorization (without Redux) example
React Redux JWT Authentication & Authorization example
Node.js CRUD Rest APIs with Express, Sequelize & PostgreSQL example
Node.js Express Pagination with PostgreSQL example
Node.js Express File Upload Rest API example
Node.js Express File Upload with Google Cloud Storage example
Associations:
Sequelize Associations: One-to-Many Relationship example
Sequelize Associations: Many-to-Many Relationship example
Integration on same Server/Port:
Integrate Vue with Node.js Express
Integrate Angular with Node.js Express
Integrate React with Node.js Express
Then, edit app/config/db.config.js
with correct DB credentials.