[keycloak-user] Getting abstract method error for creating external Provider SPI

Hello, My usecase was with JWE tokens and hence I started with implementing custom external IDP extension like oidc in keycloak. I started my SPI by extending AbstractIdentityProviderFactory, AbstractOAuth2IdentityProvider, OAuth2IdentityProviderConfig classes. But when I try to use this provider for login I get the below error: ERROR [io.undertow.request] (default task-15) UT005023: Exception handling request to /auth/realms/com/broker/cust/login: org.jboss.resteasy.spi.UnhandledException: java.lang.AbstractMethodError: co.com.custom.spi.CustomtIdentityProviderFactory.create(Lorg/keycloak/models/IdentityProviderModel;)Lorg/keycloak/broker/provider/IdentityProvider; at org.jboss.resteasy.core.ExceptionHandler.handleApplicationException(ExceptionHandler.java:76) at org.jboss.resteasy.core.ExceptionHandler.handleException(ExceptionHandler.java:212) Caused by: java.lang.AbstractMethodError: co.com.custom.spi.CustomIdentityProviderFactory.create(Lorg/keycloak/models/IdentityProviderModel;)Lorg/keycloak/broker/provider/IdentityProvider; at org.keycloak.services.resources.IdentityBrokerService.getIdentityProvider(IdentityBrokerService.java:805) at org.keycloak.services.resources.IdentityBrokerService.performLogin(IdentityBrokerService.java:156) Can anyone help me where did I go wrong ? Thanks