How to use

authenticationManager

method

in

org.springframework.security.config.web.server.ServerHttpSecurity$OAuth2LoginSpec

@Bean
public SecurityWebFilterChain springSecurityFilter(ServerHttpSecurity http) {
  // @formatter:off
  http
    .authorizeExchange()
      .anyExchange().authenticated()
      .and()
    .oauth2Login()
      .authenticationConverter(authenticationConverter)
      .authenticationManager(authenticationManager());
  return http.build();
  // @formatter:on
}

  @Bean
  public SecurityWebFilterChain springSecurityFilter(ServerHttpSecurity http) {
    http
      .authorizeExchange()
        .anyExchange().authenticated()
        .and()
      .oauth2Login()
        .authenticationConverter(authenticationConverter)
        .authenticationManager(manager)
        .authenticationMatcher(matcher)
        .authorizationRequestResolver(resolver);
    return http.build();
  }
}