in auth-lib/src/main/java/com/spotify/sdk/android/auth/AuthorizationRequest.java [180:197]
private AuthorizationRequest(String clientId,
AuthorizationResponse.Type responseType,
String redirectUri,
String state,
String[] scopes,
boolean showDialog,
Map<String, String> customParams,
String campaign) {
mClientId = clientId;
mResponseType = responseType.toString();
mRedirectUri = redirectUri;
mState = state;
mScopes = scopes;
mShowDialog = showDialog;
mCustomParams = customParams;
mCampaign = campaign;
}