fix: "Revert "fix: migrate signBlob to iamcredentials.googleapis.com""#600

busunkim96 merged 1 commit intomastergoogleapis/google-auth-library-python:masterfrom

revert-563-revert-553-iamcredentials-migrationgoogleapis/google-auth-library-python:revert-563-revert-553-iamcredentials-migrationCopy head branch name to clipboard