Spring Authorization Server OTP Grant FIXED | ClassCastException Solved | JWT Token Generation

In this video, we deep dive into Spring Authorization Server and fix a real-world issue with Custom OTP Grant.

If you are getting ClassCastException while generating access token, this video will help you understand the exact root cause and solution.

We will cover:
- Why Spring rejects UsernamePasswordAuthenticationToken
- How OAuth2TokenEndpointFilter works internally
- What Spring expects: OAuth2AccessTokenAuthenticationToken
- How to fix token generation using OAuth2TokenGenerator
- JWT Token generation using JWKSource and NimbusJwtEncoder
- DelegatingOAuth2TokenGenerator explained in depth
- Difference between JWT and Opaque Access Tokens
- Real Banking Application level implementation

This is part of our Real-World Banking Application Series using Spring Boot Microservices.

Topics Covered:
Spring Authorization Server Tutorial
Custom OAuth2 Grant Type
OTP Authentication Flow
JWT Token Generation Spring Boot
JWKSource Explained
Spring Security OAuth2 Internals
Access Token vs JWT Token
DelegatingOAuth2TokenGenerator

अगर आप Spring Security, OAuth2, JWT और Microservices सीखना चाहते हैं, तो ये वीडियो आपके लिए बहुत important है।

चैनल: HindiCodeClass
Series: Real Banking Application

#SpringBoot #OAuth2 #JWT #SpringSecurity #Microservices #Java #BackendDevelopment

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