Serverless components Graphql - OPENID issue

[andymrussell]

Hi,
I believe this is the right repo to post this.

When specifying the the auth option for OpenID in the serverless graphql component, I get an error saying:

"BadRequestException: Authentication type not specified"
I believe this is an issue here:
https://github.com/serverless/aws-sdk/blob/b552a3954e6cadb093db4127cb8458192c7bb35b/src/deployAppSyncApi.js

There is no authenticationType specified if not one of these API_KEY, AWS_IAM, AMAZON_COGNITO_USER_POOLS

I don't know if this is something that is not supported yet, or a bug, or should be raised elsewhere?

Also, not sure how I would go about even testing the fix with serverless components hence no PR.