type User struct {
Name string `json:"name" validate:"min_len=3,max_len=64"`
Age uint `json:"age" validate:"min=18,max=95"`
Dog Dog `json:"dog_pet"`
Emails map[int]string `validate:"min_items=1,key=[max=3],value=[min_len=5]"`
Title *Title `validate:"not_null"`
}