Lookup returns saved user profile.

curl --request POST \
     --url /v1/lookup \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{
     "userId": ""
     }'

var myHeaders = new Headers();
myHeaders.append("accept", "application/json");
myHeaders.append("content-type", "application/json");

var raw = JSON.stringify({
   "userId": ""
});

var requestOptions = {
   method: 'POST',
   headers: myHeaders,
   body: raw,
   redirect: 'follow'
};

fetch("/v1/lookup", requestOptions)
   .then(response => response.text())
   .then(result => console.log(result))
   .catch(error => console.log('error', error));

require "uri"
require "json"
require "net/http"

url = URI("/v1/lookup")

http = Net::HTTP.new(url.host, url.port);
request = Net::HTTP::Post.new(url)
request["accept"] = "application/json"
request["content-type"] = "application/json"
request.body = JSON.dump({
   "userId": ""
})

response = http.request(request)
puts response.read_body

import requests
import json

url = "/v1/lookup"

payload = json.dumps({
   "userId": ""
})
headers = {
   'accept': 'application/json',
   'content-type': 'application/json'
}

response = requests.request("POST", url, headers=headers, data=payload)

print(response.text)

// Valid response
{
  "experimentBucketMap": {
    "your_experiment_id": {
      "variation_id": ""
    }
  },
  "userId": ""
}

// Missing required parameters

// Unauthorized, invalid JWT

// You do not have necessary permissions for the resource
{
  "error": ""
}

// User Profile Service not found