GitHub OAuth2 Configuration

• Create a GitHub application to obtain the client ID and client secret.

• Configure your Spring Boot application with these credentials in the application.properties or application.yml file.

server.port = 8080
spring.security.oauth2.client.registration.github.client-id= 

spring.security.oauth2.client.registration.github.client-secret=

Required Dependency

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>

Security Configuration

package com.hystrix.demo.security;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.web.SecurityFilterChain;

import static org.springframework.security.config.Customizer.withDefaults;

@Configuration
@EnableWebSecurity
public class SecurityConfig {
    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
       return   http
                .authorizeHttpRequests(auth-> {
                    auth.requestMatchers("/send").permitAll();
                    auth.anyRequest().authenticated();
                        })
               .oauth2Login(withDefaults())
                .formLogin(withDefaults())
                .build();
    }
}

Controller

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class homeController {
    @GetMapping("/send")
    public String emailService() {
        return "this is email services ";
    }

        @GetMapping("/secured")
        public String secured() {
            return "this is secured services ";

    }
}

Test the Application

Run your Spring Boot application and test the GitHub OAuth2 login. Ensure that users can log in using their GitHub credentials.