clientRegistrationRepository cannot be null - oauth-2.0

Question

Keycloak OAuth 2.0 clientRegistrationRepository cannot be null.
Hello, discovered a problem, when trying to make use of OAuth 2.0 in my application. It fails after the startup. Message:
Exception encountered during context initialization - cancelling
refresh attempt:
org.springframework.beans.factory.UnsatisfiedDependencyException:
Error creating bean with name
'org.springframework.security.config.annotation.web.reactive.WebFluxSecurityConfiguration':
Unsatisfied dependency expressed through method
'setSecurityWebFilterChains' parameter 0; nested exception is
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'springSecurityFilterChain' defined in class
path resource
[com/microservices/apigateway/security/SecurityConfig.class]: Bean
instantiation via factory method failed; nested exception is
org.springframework.beans.BeanInstantiationException: Failed to
instantiate
[org.springframework.security.web.server.SecurityWebFilterChain]:
Factory method 'springSecurityFilterChain' threw exception; nested
exception is java.lang.IllegalArgumentException:
clientRegistrationRepository cannot be null
Cannot find any info in the net about the possible nature of this problem.
SecurityConfig
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
import org.springframework.security.config.web.server.ServerHttpSecurity;
import org.springframework.security.web.server.SecurityWebFilterChain;
#Configuration
#EnableWebFluxSecurity
public class SecurityConfig {
#Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
http
.authorizeExchange()
.pathMatchers("/actuator/**")
.permitAll()
.and()
.authorizeExchange()
.anyExchange()
.authenticated()
.and()
.oauth2Login() // to redirect to oauth2 login page.
;
return http.build();
}
}
application.properties
spring.application.name=api-gateway
server.port=8765
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka
#spring.cloud.gateway.discovery.locator.enabled=true
#spring.cloud.gateway.discovery.locator.lowerCaseServiceId=true
spring.sleuth.sampler.probability=1.0
spring.security.oauth2.client.provider.myprovider.issuer-uri=http://localhost:8083/realms/MyMicroservicesRealm
spring.security.oauth2.client.provider.myprovider.authorization-uri=http://localhost:8083/realms/MyMicroservicesRealm/protocol/openid-connect/auth
spring.security.oauth2.client.provider.myprovider.token-uri=http://localhost:8083/realms/MyMicroservicesRealm/protocol/openid-connect/token
spring.security.oauth2.client.provider.myprovider.jwk-set-uri=http://localhost:8083/realms/MyMicroservicesRealm/protocol/openid-connect/certs
spring.security.oauth2.client.provider.myprovider.user-info-uri=http://localhost:8083/realms/MyMicroservicesRealm/protocol/openid-connect/userinfo
spring.security.oauth2.client.provider.mywebclient.user-name-attribute = preferred_username
spring.security.oauth2.client.registration.myclient.provider=myprovider
spring.security.oauth2.client.registration.myclient.scope=openid, profile, roles
spring.security.oauth2.client.registration.myclient.client-id=gateway-client
spring.security.oauth2.client.registration.myclient.client-secret=ajKhFIsMi3qJNlXkVTS8AFhYwhv3TUSh
spring.security.oauth2.client.registration.myclient.authorization-grant-type=authorization_code
spring.security.oauth2.client.registration.myclient.redirect-uri="{baseUrl}/login/oauth2/code/keycloak"
logging.level.org.springframework.security.web=DEBUG

Answer 1

Resolved by removing spring-boot-starter-web dependency