Your Apple-ID, password and IPA file are only saved until the upload is done. After the uplaod the data gets immediately deleted.
Here a couple of common errors and what to do about it:
|No errors uploading '/wwwroot/ApplicationLoader/wwwroot/App_Data/uploads/fcbf2354-4d0e-4273-8bb8-7593ebaf6141/App.ipa'||Nothing to do the upload was successful.|
|ERROR ITMS-4238: "Redundant Binary Upload. There already exists a binary upload with build version '1.0.0' for train '1.0.0'" at SoftwareAssets/PreReleaseSoftwareAsset||Increase the version number of the App.|
|Your Apple ID or password was entered incorrectly.||Enter your correct Apple credentails. (You will be not charged for this upload)|
You will get a mail about the upload result.
No you can create a upload only account. (Guide coming soon.)
Currently only credit cards (prepaid and debit is also working).