Update User Info

curl --request PATCH \
  --url http://localhost:8080/user \
  --header 'Content-Type: application/json' \
  --data '{
  "username": "<string>",
  "password": "<string>",
  "language": "en"
}'

{
  "username": "<string>",
  "language": "en",
  "dateCreated": 123,
  "dateUpdated": 123
}