[Feature] add support for OAuth2 Implicit Auth

[michaeldcanady]

Description

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Use Case

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Proposed Solution

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Related Issues

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Checklist

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Thank you for your contribution!

[michaeldcanady]

Found (#138)[https://github.com/golang/oauth2/issues/138] which hasn't been updated in 7 years - until now by me - it doesn't seem like this will be implemented unless we do it...