auth

type Auth struct {
	LoadUser   LoadUserFunc  // Returns a user from the backing store
	StoreUser  StoreUserFunc // Stores a user to the backing store
	Hash       crypto.Hash   // Hash function to hash the salted password. Use at least SHA-2 (such as SHA-256, SHA-512, etc)
	SaltLength uint          // Length of the generated salts. The generated salt should be at least the same length as the length of the output of the hash function. For example, it should be at least 256/8 = 32 for SHA-256
}

type LoadUserFunc func(username string) (user User, exists bool)

type StoreUserFunc func(user User)

type User struct {
	Username string
	Password string // hex string of salted hash of the password
	Salt     string
}