KeyFromString creates the key for a given string.

Must is a helper that wraps calls returning a Key and and error and panics if the error is non-nil.

NewKey generates a new random pagination key.

ErrInvalidKeyString is returned when the string representing a key is malformed.

ErrInvalidToken is returned when a token fails to Unmarshal because it was invalid or expired.

FirstPageToken is used to represent the first page of content.

Key represents the key used to cryptographically secure the token being used to keep track of pages.

Token represents an opaque pagination token keeping track of a user's progress iterating through a list of results.