Imports fyne.io/fyne/v2 fyne.io/fyne/v2/app fyne.io/fyne/v2/container fyne.io/fyne/v2/dialog fyne.io/fyne/v2/layout fyne.io/fyne/v2/theme fyne.io/fyne/v2/widget Standard library imports crypto/aes crypto/cipher crypto/md5 crypto/rand encoding/base64 encoding/hex errors fmt image/color io math/rand net/url os path strconv