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package user
import (
// Model is our User example model.
type Model struct {
ID int64 `json:"id"`
Firstname string `json:"firstname"`
Username string `json:"username"`
// password is the client-given password
// which will not be stored anywhere in the server.
// It's here only for actions like registration and update password,
// because we caccept a Model instance
// inside the `DataSource#InsertOrUpdate` function.
password string
HashedPassword []byte `json:"-"`
CreatedAt time.Time `json:"created_at"`
// GeneratePassword will generate a hashed password for us based on the
// user's input.
func GeneratePassword(userPassword string) ([]byte, error) {
return bcrypt.GenerateFromPassword([]byte(userPassword), bcrypt.DefaultCost)
// ValidatePassword will check if passwords are matched.
func ValidatePassword(userPassword string, hashed []byte) (bool, error) {
if err := bcrypt.CompareHashAndPassword(hashed, []byte(userPassword)); err != nil {
return false, err
return true, nil
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