Backport #25701 by @CaiCandong
we refactored `userIDFromToken` for the token parsing part into a new
function `parseToken`. `parseToken` returns the string `token` from
request, and a boolean `ok` representing whether the token exists or
not. So we can distinguish between token non-existence and token
inconsistency in the `verfity` function, thus solving the problem of no
proper error message when the token is inconsistent.
close#24439
related #22119
Co-authored-by: caicandong <50507092+CaiCandong@users.noreply.github.com>
Co-authored-by: Jason Song <i@wolfogre.com>
ee87b4e18c