Fix for older requests versions (<2.12.2)

Author: oschwald

minfraud/webservice.py

@@ -43,9 +43,9 @@ def __init__(self,
         """
         # pylint: disable=too-many-arguments
         self._locales = locales
-        # requests 2.12.2 requires that the username passed to auth be bytes
-        # or a string, with the former being preferred.
-        self._user_id = str(user_id).encode()
+        # requests 2.12.2 requires that the username passed to auth be a
+        # string
+        self._user_id = str(user_id)
         self._license_key = license_key
         self._base_uri = u'https://{0:s}/minfraud/v2.0'.format(host)
         self._timeout = timeout