https://medium.com/@pliutau/getting-started-with-oauth2-in-go-2c9fae55d187

https://medium.com/@cgrant/golang-oauth2-google-example-for-web-and-api-59187ce8b119

https://skarlso.github.io/2016/06/12/google-signin-with-go/

https://www.quora.com/How-can-I-safely-store-an-access-token-in-my-back-end-after-the-user-authenticated-with-Google+-Facebook

https://www.sohamkamani.com/blog/golang/2018-06-24-oauth-with-golang/

https://oauth.net/2.1/

https://stackoverflow.com/questions/10456174/oauth-how-to-test-with-local-urls

https://api.slack.com/docs/oauth-safety

https://medium.com/@hfogelberg/the-black-magic-of-oauth-in-golang-part-1-3cef05c28dde

https://twittercommunity.com/t/why-cant-i-use-localhost-as-my-oauth-callback/708

https://security.stackexchange.com/questions/72475/should-we-store-accesstoken-in-our-database-for-oauth2

https://stackoverflow.com/questions/1878830/securly-storing-openid-identifiers-and-oauth-tokens

https://github.com/markbates/goth