📄️ Add Custom Metadata Function
This section details the addCustomMetadata function within the MNS service. This function allows the current owner (user) of a registered identity (identity, typically a username) to associate a custom string value (_value) with their identity.
📄️ Remove Custom Metadata Function
This section details the removeCustomMetadata function within the MNS service. This function allows the current owner (user) of a registered identity (identity, typically a username) to remove a specific custom metadata entry identified by its index (_key).