model

var (
	// ErrNoKeyID returned if the JWT lacks a kid value in the header.
	ErrNoKeyID = errors.New("missing key ID in header")

	// ErrNoKey returned if the key ID is invalid (or expired).
	ErrNoKey = errors.New("invalid key ID")

	// ErrInvalidAlgorithm returned if the algorithm is the wrong type.
	ErrInvalidAlgorithm = errors.New("invalid algorithm")

	// ErrTokenExpired returned if the JWT has expired.
	ErrTokenExpired = errors.New("token expired")

	// ErrTokenUsedBeforeIssued returned if the token is used prematurely.
	ErrTokenUsedBeforeIssued = errors.New("token used before issued")
)

var (
	// UserDB mimics a database of users.
	UserDB = make(map[string]User)

	// ErrNotFound returned if the username is invalid.
	ErrNotFound = errors.New("user not found")
)