Change Google scope in external providers sample

[guardrex]

See ...

https://developers.google.com/+/web/api/rest/oauth ...

For login purposes, use the profile or https://www.googleapis.com/auth/plus.login scope. The https://www.googleapis.com/auth/plus.me scope is not recommended as a login scope because, for users who have not upgraded to Google+, it does not return the user's name or email address. **

Cross-ref: dotnet/AspNetCore.Docs#3744 (comment)

[guardrex]

@HaoK

An error occurred while loading the YAML build pipeline. Repository self references endpoint 6510879c-eddc-458b-b083-f8150e06ada5 which does not exist or is not authorized for use

[HaoK]

Don't worry about the vsts ci failure for now the other ci builds are green so its good to go

[natemcmaster]

@HaoK @guardrex this repo is about to be archived. Its contents have been merged into https://github.com/aspnet/AspNetCore. If this is a PR we should still take, please re-open the PR on the new repo.

cref dotnet/aspnetcore#4088