I am trying to enable access from an iOS app I am writing that will access the FitBit API to log nutrition. I am trying to use the SFSafariViewController to authenticate the user as per the recommended Authorization flow. How do I inject the Authorization header into the SFSafariViewController as I keep getting the following error:
{"errorType":"invalid_client","message":"Invalid authorization header format. Visit https://dev.fitbit.com/docs/oauth2 for more information on the Fitbit Web API authorization process."}
The URL I am trying to authenticate is below:
https://www.fitbit.com/oauth2/authorize?expires_in=604800&response_type=code&code_challenge_method=S...
I am using the AppAuth library located at https://github.com/openid/AppAuth-iOS to authenticate to the API.
Any help is appreciated.
Thanks!
