func (user *User) Validate(v *revel.Validation) {
v.Required(user.Username)
v.MinSize(user.Username, 6)
v.Required(user.FirstName)
v.Required(user.LastName)
v.Required(user.Age)
v.Range(user.Age, 16, 120)
v.Required(user.Password)
v.MinSize(user.Password, 6)
v.Required(user.PasswordConfirm)
v.Required(user.PasswordConfirm == user.Password).
Message("The passwords do not match.")
v.Required(user.Email)
v.Email(user.Email)
v.Required(user.EmailConfirm)
v.Required(user.EmailConfirm == user.Email).
Message("The email addresses do not match")
v.Required(user.TermsOfUse)
}