Github Repo's owner query https://docs.github.com/en/graphql/overview/explorer

organization-variables.json

{
  "owner": "SwiftPackageIndex",
  "name": "SwiftPackageIndex-Server"
}

person-variables.json

{
  "owner": "JohnSundell",
  "name": "Plot"
}

query.gql

query ($name: String!, $owner: String!) {
  repository(name: $name, owner: $owner) {
    owner {
      login
      avatarUrl
    }
  }
}