Implementing GraphQL pagination in gqlgen

schema-full.graphql

type Message {
  id: ID!
  text: String
}

type MessagesConnection {
  edges: [MessagesEdge!]!
  pageInfo: PageInfo!
}

type MessagesEdge {
  cursor: ID!
  node: Message
}

type PageInfo {
  startCursor: ID!
  endCursor: ID!
  hasNextPage: Boolean
}

type ChatRoom {
  id: ID!
  name: String
  messagesConnection(first: Int = 20, after: ID): MessagesConnection
}

type Query {
  chatRoom(id: ID!): ChatRoom!
}