Temporarily restore OAuth2Request body parameter by azmeuk · Pull Request #791 · authlib/authlib

This restores and deprecate the OAuth2Request parameter that have been removed with 1.6.0.

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

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