Fix #52 Change Escape String Type

Change escape string type from string-escape to unicode_escape
for Live login
Merge pull request #53 from amayer5125/master

3.5.5 @amayer5125, Change escape string type from string-escape to unicode_escape.
Fixes login issue.
See https://github.com/sealemar/BingRewards/issues/52
and https://github.com/sealemar/BingRewards/issues/50