Good afternoon,
I am following the OAuth2 flow. I implemented an authorization code link 
, authorized the client application , received the authorization code but I cannot receive the access token 
When I try to exchange the authorization code to receive the access token, I get following error :
{
error: 'invalid_client',
error_description: 'Client authentication failed (e.g., unknown client, no client authentication included, or unsupported authentication method). passwords do not match'
}
My issue is quite similar to Web API Authentication - #25 by Gigi No answer was provided there.
Additional info :
My advanced API request has been approved.
When I try to use Swagger, it doesn’t work either. When I click on Authorize, fill the client_id field (with my OAuth2 API key), fill the scopes section and click on Authorize, then I get an error too :
{
"id": "invalid_request",
"error": {
"status": "OAuth2 Error",
"id": "invalid_request",
"message": "The request is missing a required parameter, includes an invalid parameter value, includes a parameter more than once, or is otherwise malformed. The 'redirect_uri' parameter does not match any of the OAuth 2.0 Client's pre-registered redirect urls.",
"code": 599
}
}
