@Bean(IMongoCollectionInitializer.BEAN_NAME)
    public IMongoCollectionInitializer mongoDataGenerator() {
        return new IMongoCollectionInitializer() {
        };
    }
@return null if {@link IdentityAccessManagementProperties#enabled} is false or
        {@link IdentityAccessManagementProperties#type} is not
        {@link IdentityAccessManagementType#PASSWORD}
turms-gateway/src/main/java/im/turms/gateway/storage/mongo/MongoConfig.java