What is the introduction of the story Mankato and the Cowrie Shell?

"Mankato and the Cowrie Shell" is a Nigerian folktale about a kind-hearted young man named Mankato who receives a magical cowrie shell from the river god. The cowrie shell grants Mankato the power to grant any wish he desires, leading him on a journey of self-discovery and ultimately teaching him valuable lessons about the importance of humility and compassion.