Get all teams and their permissions on repositories via GraphQL

teams.graphql

query 
{
  organization(login: "octodemo") {
    teams(first: 100, after: null) {
      nodes {
        name
        repositories {
          nodes {
            name
            viewerPermission
          }
        }
      }
      pageInfo {
        hasNextPage
        endCursor
      }
    }
  }
}