The PSD2 regulation requires you to confirm your bank account link with OkiOki every 90 days. Thus, you must re-authorize OkiOki to access your account info every 90 days.
Once you reach that deadline, OkiOki will notify you and invite you to reconfirm the link to your bank account. To do so, you follow the same procedure as when you initially linked your bank account. OkiOki refers you to your online bank where you confirm your link via Itsme or via your bank card and bank card reader.