fix: AttributeError: module 'importlib' has no attribute 'metadata'

[zzz-heygen]

fixing #617
What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

---

• You consent that the copyright of your pull request source code belongs to Authlib's author.

[codespearhead]

Can you link this PR to that issue ( #617 ), like this?

[zzz-heygen]

As long as you mentioned the number of the issue, Github can automatically link it. If you check the issue page, it says I am referencing the issue.

[codespearhead]

I'm afraid there's been a misunderstanding here. Referencing an issue is not the same as linking a PR to it, as can be seen in the lower right-hand corner of the page in desktop mode.

Mentioning the issue id will only automatically link a PR to it if it's preceded by a specific set of keywords, and "fixing" is not one of them. As per the documentation:

You can link a pull request to an issue by using a supported keyword in the pull request's description or in a commit message. The pull request must be on the default branch.

• close
• closes
• closed
• fix
• fixes
• fixed
• resolve
• resolves
• resolved

[kravuri517]

Hi, any update on when this fix will be merged? Your assistance is greatly appreciated.