curl --request PUT \
  --url https://production.runalloy.com/users/{userId} \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --header 'x-api-version: <x-api-version>' \
  --data '{
  "username": "<string>",
  "fullName": "<string>"
}'

{
  "userId": "6323d7c9122ae69742a5d0a2",
  "fullName": "Gregg Mojica",
  "username": "greggmojica"
}