[Feature request] Option to throw error on user sign up if email has accents or diacritics

Thanks a bunch for the feedback @clement1! Let’s hope this gains some traction with other community members :smiley: :arrow_up:

@tyf, i mean, even without community upvotes, you should really support this kind of detail as an auth provider. managing well email formating at the sign up is a basic :wink: