BREAKING CHANGE: `token` attribute of OAuth2Auth credentials used to be a dict containing both access_token and refresh_token, given that may cause confusions, now we replace it with access_token and refresh_token at top level of the auth credentials
PiperOrigin-RevId: 750346172
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16994cb2d5d646341f5285ca71d72697d81d18fe by Nilanjan De <nilanjan.de@gmail.com>:
chore: fix typos
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/272 from n1lanjan:fix-typos a1ab655b08ec08c5dd2da71aab9a2386e3610e84
PiperOrigin-RevId: 749690489