when i put my link for create new api i have this error:
client name already exists
Veuillez réessayer
I think its because somebody used the my website adresse, its is possible to twitch moderator to delete old?
Client name already exists console api
You can’t really ask for other people content to be removed.
You can use another name, more specified instead 
i changed name, but when i put my website adresse i have this error:
invalid redirect URI provided
Veuillez réessayer
nvmd localhost is work