diff --git a/spring-boot-modules/spring-boot-keycloak-2/src/main/java/com/baeldung/disablingkeycloak/KeycloakSecurityConfig.java b/spring-boot-modules/spring-boot-keycloak-2/src/main/java/com/baeldung/disablingkeycloak/KeycloakSecurityConfig.java
index f5837ba2a5..f024c461a7 100644
--- a/spring-boot-modules/spring-boot-keycloak-2/src/main/java/com/baeldung/disablingkeycloak/KeycloakSecurityConfig.java
+++ b/spring-boot-modules/spring-boot-keycloak-2/src/main/java/com/baeldung/disablingkeycloak/KeycloakSecurityConfig.java
@@ -3,8 +3,6 @@ package com.baeldung.disablingkeycloak;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-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.configurers.oauth2.server.resource.OAuth2ResourceServerConfigurer;
@@ -33,10 +31,4 @@ public class KeycloakSecurityConfig {
         http.oauth2ResourceServer(OAuth2ResourceServerConfigurer::jwt);
         return http.build();
     }
-
-    @Bean
-    public AuthenticationManager authenticationManager(HttpSecurity http) throws Exception {
-        return http.getSharedObject(AuthenticationManagerBuilder.class)
-            .build();
-    }
 }