# Functions
NewPasetoBuilder returns a new PasetoBuilder.
NewPayload creates a new payload for a specific username and duration.
# Variables
ErrExpiredToken is returned when a token has expired.
ErrInvalidToken is returned when a token is invalid.
# Structs
PasetoBuilder implements TokenBuilder.
Payload contains the payload data of the token.
PayloadData contains the payload data of the token.
# Interfaces
TokenBuilder is an interface for managing tokens.