This method allows you to obtain a valid access token from the Assist API. Generally, this method is invoked automatically for authentication purposes whenever you retrieve a client instance, so you do not need to actively invoke this method.
This method does not have any mandatory parameters.
This method does not have any optional parameters.
When invoked, the method returns an access token for the Assist API.
For the full response model, see the Responses section of the POST /auth endpoint
on the Authorization API Routes page.
client.Auth().then(data => {}).catch(error => {})