Get User

curl --request GET \
  --url https://api.codegen.com/v1/organizations/{org_id}/users/{user_id}

{
  "id": 123,
  "email": "<string>",
  "github_user_id": "<string>",
  "github_username": "<string>",
  "avatar_url": "<string>",
  "full_name": "<string>"
}