fixes issue #531, when extracting user email, we check it against the database, and return user default email. Also if no email is present check the username for matching targets.
"""Various utilities to work with Python < 2.7.Those utilities may be deleted once ``vcs`` stops support for older Pythonversions."""importsysifsys.version_info>=(2,7):unittest=__import__('unittest')else:unittest=__import__('unittest2')