Spring Security provides some configuration helpers to set up authentication manager features in your application. This will help to get the features quickly. AuthenticationManagerBuilder helps to modify the authentication managers.

Here is an example of how to implement AuthenticationManagerBuilder in the ApplicationSecurity.kt class:

class ApplicationSecurity: WebSecurityConfigurerAdapter() {
    @Autowired
    fun initialize(builder: AuthenticationManagerBuilder, dataSource: DataSource){
builder.jdbcAuthentication().dataSource(dataSource).withUser("Sunnat629").password("packtPub").roles("USER")
 }
}

Here, we have given a username, sunnat629, and a password, packtPub, as a USER role in this application.