What kind of change does this PR introduce? (check at least one)
[ ] Bugfix
[ ] Feature
[ ] Code style update
[ ] Refactor
[x] Other, please describe:
Issue #567 introduced a "leeway" parameter for proactive token refreshing. Expose this parameter in clients (e.g., the requests client) to allow configuring it by the library's users.
[x] You consent that the copyright of your pull request source code belongs to Authlib's author.
What kind of change does this PR introduce? (check at least one)
Issue #567 introduced a "leeway" parameter for proactive token refreshing. Expose this parameter in clients (e.g., the
requests
client) to allow configuring it by the library's users.