Retrieve user information with newly created token

To demonstrate that the new token is valid we should fetch

• The username of the user
• The token which was just created and the scopes for that token
• The list of all tokens for that user, grouped by scopes
• The list of organizations the user is a member of

We can do this with @octokit/rest.js

• We should encapsulate this in a helper class that we inject an instance of Octokit into
• We should hide the business logic in a controller
• Let's also make this a set of endpoints