OAuth2 Password Grant with Spring Security

Securing modern applications requires a solid grasp of token-based authentication. While newer delegation patterns are preferred for third-party integrations, the password grant remains a fundamental concept for understanding direct, high-trust client authentication. This course provides a clear, conceptual foundation of how token issuance, client credentials, and user credentials interact under the hood. You will learn how to configure authentication flows, handle token requests, and secure API endpoints. What you will learn: Understand the core mechanics of OAuth2 grant types and token exchange, Configure Spring Security to authenticate users and issue secure tokens, Manage client credentials and scopes for restricted API access, Handle token expiration, renewal patterns, and modern refresh token strategies, Apply modern security best practices including password hashing and secure transmission. We begin with essential terminology and the conceptual architecture of token-based security, then progress through step-by-step configuration patterns and security best practices. This course is designed for backend developers and security beginners who want to understand authentication flows without needing prior OAuth2 experience. Start reading today to build a secure foundation for your enterprise applications.