# Direct UTF-8 in JSON payload curl -X POST https://api.ubisoft.com/v1/email/verify \ -H "Content-Type: application/json; charset=utf-8" \ -d '"email":"müllerchen@müller.de"' \ --verbose 2>&1 | grep -i "content-type\|charset"

Command line (quick view):

: Once you have an access token, you can make API requests. If there's an endpoint to get user information (which might include email), you would use the access token to authenticate this request.

If you are a new user, you will likely never see this error. If you are an old user, and the problem vanishes.