Lets Talk Spiritual leaders in Nigeria

I was reading up about the topic of shirk and for some reasons the topic of Alfas came to mind. So I ended up doing a quick google search to try to understand who Alfas really are, their jobs and where they stand in the ummah. Unfortunately, I was unable to find information related to who they are or what they do. Therefore, I will be defining Alfas based on my experiences and encounters with them.