InternalOAuthError is not part of passport, but of passport-oauth2
InternalOAuthError is not part of passport, but of passport-oauth2

This fixes part of #1056: an error while obtaining the profile
would have `502`-crashed the server.

Signed-off-by: Claudius Coenen <279a4cf6d7f8da1ddc113bb946b9273d9d938683@amenthes.de>

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