Prepopulate input data after validation golang echo

[madasatya6]

how to display data back in the form after being validated ?

i have tried to save my struct in SetFlashdata() function but error.
below is the code :

type MyForm struct {
        Num     []string `json:"num[]" form:"num[]" query:"num[]" validate:"required,unique"`
	Name      []string `json:"name[]" form:"name[]" query:"name[]" validate:"required"`
	Description []string `json:"description[]" form:"description[]" query:"description[]" validate:"required"`
}

func SetFlashdata(c echo.Context, name, value string){
	session, _ := SessionStore.Get(c.Request(), "fmessages")
	session.AddFlash(value, name)

	session.Save(c.Request(), c.Response())
}

---

in main() function :

prepopulate := new(MyForm)
SetFlashdata(c, "params", prepopulate)