UserDetailsService

UserDetailsService is used by DaoAuthenticationProvider for retrieving a username, password, and other attributes for authenticating with a username and password. Spring Security provides in-memory and JDBC implementations of UserDetailsService.

You can define custom authentication by exposing a custom UserDetailsService as a bean. For example, the following will customize authentication assuming that CustomUserDetailsService implements UserDetailsService:

This is only used if the AuthenticationManagerBuilder has not been populated and no AuthenticationProviderBean is defined.

Example 1. Custom UserDetailsService Bean

Java

@Bean
CustomUserDetailsService customUserDetailsService() {
	return new CustomUserDetailsService();
}

XML

<b:bean class="example.CustomUserDetailsService"/>

Kotlin

@Bean
fun customUserDetailsService() = CustomUserDetailsService()