GitHub can do that. Eg if you try to use GitHub to sign into gitlab.com: GitLab.com by GitLab wants to access your unilynx account - Personal user data - Ema

GitHub can do that. Eg if you try to use GitHub to sign into gitlab.com: GitLab.com by GitLab wants to access your unilynx account - Personal user data - Email addresses (read-only) This application will be able to read your private email addresses.