def has_value_changed(self, old_value, new_value):
        return old_value != new_value
Verifies the correctness of the given access token, that was previously generated in
dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/reviews/fields.py/BaseReviewRequestField.has_value_changed--crossover with--dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/identity.py/Identity.VerifyAccessToken