Obtain an API token for a user, based on a request token generated while using the Add-On authentication flow for 3rd party systems.

post https://sandbox.elabjournal.com/api/v1/auth/user/exchangeToken

Example:

{
  "requestToken": "abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc1"
}

You can use the resulting apiToken property in the api_key field above to access all other API calls.