What is FC Barcelona's 'fan token'?

Could you elaborate on the concept of FC Barcelona's 'fan token'? I've heard it mentioned in the cryptocurrency space but am not entirely clear on its purpose and functionality. Is it a digital asset specifically designed for fans of the club? How does it work? Does it grant holders any special privileges or access? And how does it fit into the broader cryptocurrency and blockchain ecosystem? I'm curious to understand the motivation behind this initiative and how it might reshape the relationship between fans and their favorite sports clubs.