OAuthv2 Token Request Broken

[Dajne]

Heyo

Having an issue today (this wasn't happening previously) where the api server does not like my Authorization header for a token request (exchanging a code for a access and refresh token).

Was previously working before today, code hasn't changed. Just using the documentation that states:

"Base64 encoded string, Y2xpZW50X2lkOmNsaWVudCBzZWNyZXQ=, is decoded as "client_id:client secret""

But am getting back a 400 Bad Request with this error:

{"errors":[{"errorType":"invalid_grant","message":"Authorization code invalid: 45d0a55a61b69d400e14daa52d4784a5204fa151 Visit https://dev.fitbit.com/docs/oauth2 for more information on the Fitbit Web API authorization process."}],"success":false}

 And yes... before anyone asks... I am using my own client_id and client secret 😛

[JeremiahFitbit]

invalid_grant isn't about your Authorization header. It's telling you that the authorization 'code' you're sending in the Access Token request is not valid.