SecurityConfig.java

package io.github.davibarros.clientes.config;

import org.springframework.context.annotation.Bean;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.oauth2.client.test.OAuth2ContextConfiguration.Password;


@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

	@Override
	public void configure(AuthenticationManagerBuilder auth) throws Exception{
		 auth.inMemoryAuthentication()
		.withUser("fulano")
		.password("{noop}123")
		.roles("USER");

	}


	@Bean
	public AuthenticationManager authenticationManager() throws Exception {
		return super.authenticationManager();
	}

	@Override
	protected void configure(HttpSecurity http) throws Exception{
		http
        .antMatcher("/api/**")
        .authorizeRequests()
        .anyRequest().hasRole("USER")
        .and()
        .httpBasic()
        .and()
        .csrf()
        .disable()
        .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
	}

}

________

package io.github.davibarros.clientes.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.crypto.factory.PasswordEncoderFactories;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;
import org.springframework.security.oauth2.provider.token.TokenStore;
import org.springframework.security.oauth2.provider.token.store.InMemoryTokenStore;


@Configuration
@EnableAuthorizationServer
public class AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Bean
    public TokenStore tokenStore() {
    	return new InMemoryTokenStore();
    }


    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception{
    	endpoints
    		.tokenStore(tokenStore())
    		.authenticationManager(authenticationManager);
    }

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception{
    	clients.inMemory()
    	.withClient("my-angular-app")
    	.secret("{noop}123")
    	.scopes("read","write")
    	.authorizedGrantTypes("password")
    	.accessTokenValiditySeconds(60 * 30);
    }

    public PasswordEncoder passwordEncoder() {
    	 return PasswordEncoderFactories.createDelegatingPasswordEncoder();
    }

}

AuthorizationServerConfig.java