How to change your XCode iTunes Connect login?

I don't see any answers that pertain to the XCode portion of the following question in the original post: "How can I change the login in XCode or Application Loader?"

This was significant for me as I have multiple Apple Dev IDs. When setting up a new MBP I needed to Refresh my Provisioning Profiles in the XCode Devices panel. The Refresh button uses the daw2.apple.com Web form password saved in your Keychain if you select the Remember Password in Keychain option on the "Sign in with your Apple ID" dialog. I had done so, which was preventing the downloading of provisioning profiles from my other accounts. Furthermore, the Refresh button uses cached credentials if you Refresh again after entering your Apple ID, even if you haven't selected the Keychain option.

So to Refresh multiple Apple ID provisioning profiles in XCode either:

1. Don't use the Keychain option to save your credentials and restart XCode for each Apple ID that you want to download refreshed provisioning profiles.

2. If you have saved credentials in the Keychain and you need to use a different Apple ID, remove the Keychain login item for daw2.apple.com and restart XCode.

The only way I found out to change my iTunes Connect login is using Keychain Access. Simply hit Cmd + Spacebar and search for Keychain Access. Launch that application and enter "itunes" in the search bar of Keychain Access. Choose "All Items" in Category. Delete all items that are found. Now restart XCode or Application Loader, whatever you need to use. It should be asking you for a login again!

You shouldn't need to change your itunes connect details in XCode. As long as you set the correct bundle identifier you can use a certificate from any provisioning portal and you can build your application against any developer account fine.

To change your log in details in application loader you have to go Window -> Run setup wizard... and re-enter your log in details. Then you can choose File -> New and it should find any waiting apps in the account you've just set up.