AppConfig.java

package com.example.JWTAuthenticationSpringboot.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

@Configuration
public class AppConfig {
    @Bean
    public UserDetailsService userDetailsService(){
        UserDetails user=User.builder().username("prathiksha").password
                (passwordEncoder().encode("abc")).roles("ADMIN").build();

        UserDetails user1=User.builder().username("pooja").password
                (passwordEncoder().encode("123")).roles("ADMIN").build();

        return new InMemoryUserDetailsManager(user,user1);
    }

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Bean
    public AuthenticationManager authenticationManager(AuthenticationConfiguration builder) throws Exception {
        return builder.getAuthenticationManager();
    }
}