Looking for logging into the To Use This App You Must Itunes Connect site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the To Use This App You Must Itunes Connect site. After that you can login as usual with your login credentials.
https://support.apple.com/en-us/HT201400
https://itunesconnect.apple.com/WebObjects/iTunesConnect.woa/wa/apply
https://stackoverflow.com/questions/50624619/itunes-connect-error-to-use-this-application-you-must-first-sign-in-to-itunes
https://migym.zendesk.com/hc/en-us/articles/115000261613-How-to-set-up-iTunes-Connect-and-Apple-Developer-accounts
https://support.magplus.com/hc/en-us/articles/204456258-iOS-Uploading-Builds-Using-Application-Loader
https://www.hotspotshield.com/resources/how-to-change-your-apple-store-country-to-access-more-apps/
https://docs.microsoft.com/en-us/xamarin/ios/deploy-test/app-distribution/app-store-distribution/publishing-to-the-app-store
https://novemberfive.co/blog/apple-developer-account-tutorial
https://knowledge.exlibrisgroup.com/campusM/Implementation/Implementation_Guides_and_Configuration_Forms/050Apple_Developer_Program_and_iTunes_Connect_Account_Access
https://www.idownloadblog.com/2016/03/16/fix-cannot-connect-to-itunes-store-2/
https://medium.com/create-buzz/submitting-your-podcast-to-itunes-using-itunes-connect-22b95b38068d
http://osxdaily.com/2018/03/18/fix-verification-required-app-store-message-ios/
https://www.macworld.co.uk/how-to/apple/change-reset-apple-id-3463233/