Best practices for connecting to third party services

[miko]

@sambhav-gore

First is that how best to connect to a third-party service? Lets say an emailing service or a Payment gateway?

You can use @lambda, eg in your schema:

type Mutation {
  sendEmail(to:String!) : Boolean! @lambda
} 

then use lambda server to send out your email (returning status as boolean in above case).