codeNotExistsOrExpired

private open fun codeNotExistsOrExpired(joiningQRCode: JoiningQRCode, model: Model): String

Method to format and return the INVALID_QR_CODE_PAGE due the link expiration or the not existing of that link

the title of the invalid page as String

joiningQRCode

: the custom link requested

model

: the model used by Thymeleaf to format the web page