requestOauthAccessToken method
Implementation
Future<http.Response> requestOauthAccessToken(String code) async {
return await http.post(
Uri.https(config.endpoint, "api/login/oauth/access_token"),
body: {
'client_id': config.clientId,
'grant_type': 'authorization_code',
'code': code,
'code_verifier': codeVerifier
});
}