Changes to Create a new user (optionally with initial identity links)

the email request property format changed from no format to email

added the media type application/json for the response with the status 200

added the media type application/json for the response with the status 400

added the media type application/json for the response with the status 401

removed the request property githubUsername

removed the request property gitlabUsername

removed the request property linearUserId

removed the request property slackUserId

added the new optional request property dailyBudgetUsd

added the new optional request property identities

added the new optional request property metadata

added the new optional request property status

endpoint added