[user] resend invitation when user asks for confirmation but has been…

Created by: adipasquale

https://trello.com/c/5ZCBnIuH/977-usagerinscription-renvoyer-mail-dinvitation-plutot-que-confirmation-pour-demander-mdp

⚠️ branching from feature/user-forgot-password-on-sign-up because same files edited. merge this other one first.

slightly hacky solution but should fix a tricky pb