'Determine whether to rotate the refresh token. Default, yes.
When access tokens are refreshed the old refresh token can be kept
or replaced with a new one (rotated). Return True to rotate and
and False for keeping original.
:param request: oauthlib.common.Request
:rtype: True or False
Method is used by:
- Refresh Token Grant'

def rotate_refresh_token(self, request):

    return True
