I believe you did. Here is an excerpt from the specification: https://www.oauth.com/oauth2-servers/access-tokens/access-token-response/
And here is your API reference: https://oauth.withings.com/api-reference/#operation/oauth2-getaccesstoken
The two obviously don't match.
Also, I tried to send an email through your website and it didn't work (nothing happened).
And here is your API reference: https://oauth.withings.com/api-reference/#operation/oauth2-getaccesstoken
The two obviously don't match.
Also, I tried to send an email through your website and it didn't work (nothing happened).