Spring Boot Security - Postman gives 401 Unauthorized

@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    public void configure(HttpSecurity http) throws Exception {
       http.csrf().disable().authorizeRequests()
        .antMatchers("/").permitAll()
        .antMatchers(HttpMethod.POST,"/newuser").permitAll()
        .antMatchers(HttpMethod.POST, "/login").permitAll()
        .antMatchers(HttpMethod.POST,"/newuser/*").permitAll()
        .antMatchers(HttpMethod.GET,"/master/*").permitAll()
         .antMatchers(HttpMethod.GET,"/exploreCourse").permitAll()
        .anyRequest().authenticated()
    }
}

You need to configure Spring Security, by default all routes all secured for authrorization.

Please have a look JWT Token implementation at this Link.