In the early version, the initscript did not work. Not sure if it is working the latest version, it is better to create a `ConnectionFactoryInitializer` bean for it(if you did not use Spring Boot), see my example: https://github.com/hantsy/spring-r2dbc-sample/blob/master/database-client/src/main/java/com/example/demo/DatabaseConfig.java#L84