Update a user

curl --request PUT \
  --url https://core.api.ravennahq.com/api/users/{id} \
  --header 'Content-Type: application/json' \
  --header 'x-ravenna-api-token: <api-key>' \
  --data '{
  "firstName": "<string>",
  "lastName": "<string>",
  "email": "<string>",
  "image": {
    "base64": "<string>",
    "fileName": "<string>"
  }
}'

{
  "id": "<string>",
  "firstName": "<string>",
  "lastName": "<string>",
  "email": "<string>",
  "image": "<string>",
  "slackTeamId": "<string>",
  "slackUserId": "<string>",
  "slackRealName": "<string>",
  "slackImageUrl": "<string>",
  "emailVerified": "<string>",
  "defaultWorkspaceId": "<string>",
  "isGuestCreated": true,
  "isBot": true,
  "createdAt": "<string>",
  "auth0Id": "<string>",
  "updatedAt": "<string>"
}