AccessToken with Email/Password in Java

Hey!

I am working on my first bot. :D

Unfortunately I already have problems receiving the AccessToken :(

Regarding the bot: I do not want to make it public; and it should run just on the CLI.

Thats why my credentials are hardcoded in my code (for now -> later will be entered in CLI)

Now comes the problem:

For authentication (OAuth2.0) with email / password, I am using Scribe (see github):

https://github.com/scribejava/scribejava/

my setup looks like following:

// setup the serviceBuilder (OAuth)
final ServiceBuilder serviceBuilder = new ServiceBuilder(Constants.CLIENT_ID)
		.apiSecret(Constants.SECRET)
		.scope(Constants.SCOPE_ACCOUNTS)
		.build(SpotwareOAuthApi.instance());

final OAuth2AccessToken token = service.getAccessTokenPasswordGrant("myEmail@iDoNotTell.you", "MyPassword");

///////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////

public class SpotwareOAuthApi extends DefaultApi20 {

	protected SpotwareOAuthApi() {
	}

	private static class InstanceHolder {
		private static final SpotwareOAuthApi INSTANCE = new SpotwareOAuthApi();
	}

	public static SpotwareOAuthApi instance() {
		return InstanceHolder.INSTANCE;
	}

	@Override
	public Verb getAccessTokenVerb() {
		//return Verb.GET;
		return Verb.POST;
	}

	@Override
	public String getAccessTokenEndpoint() {
		return Constants.AUTH_URL + "/apps/token";
	}

	@Override
	protected String getAuthorizationBaseUrl() {
		return Constants.AUTH_URL + "/apps/auth";
	}

	@Override
	public TokenExtractor<OAuth2AccessToken> getAccessTokenExtractor() {
		return OAuth2AccessTokenExtractor.instance();
	}

	@Override
	public OAuth2SignatureType getSignatureType() {
		//return OAuth2SignatureType.BEARER_URI_QUERY_PARAMETER;
		return OAuth2SignatureType.BEARER_AUTHORIZATION_REQUEST_HEADER_FIELD;
	}
}

I am not able to successfully get an accessToken.

I follow the web requests via charles proxy (see below)

The clientId is not directly in the request, it is added as header like following (see Authorization):

POST
https://connect.spotware.com/apps/token

Authorization	Basic I_WILL_NOT_TELL_YOU
Content-Type	application/x-www-form-urlencoded
User-Agent	Java/1.8.0_72
Host	connect.spotware.com
Accept	text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
Connection	keep-alive
Content-Length	99

This is how the response looks like:

{
	"errorCode": "INVALID_REQUEST",
	"description": "Malformed client_id parameter"
}

I hope anybody can help me...

Thanks in advance,

Lucas