'Get hunt approval identified by approval id, hunt id and username.'

@Category('User')
@ArgsType(api_user.ApiGetHuntApprovalArgs)
@ResultType(api_user.ApiHuntApproval)
@NoAuditLogRequired()
@Http('GET', '/api/users/<username>/approvals/hunt/<hunt_id>/<approval_id>', strip_root_types=False)
def GetHuntApproval(self, args, token=None):

    raise NotImplementedError()
