Add support for type variable

[duygithub]

Is your feature request related to a problem? Please describe. According to https://developer.nylas.com/docs/api/v3/scheduler/#tag/configurations/POST/v3/grants/%7Bgrant_id%7D/scheduling/configurations There is a type value that takes in collective group max-availability max-fairness one-on-one

There is currently no way to pass in this value.

Describe the solution you'd like Have the ability to pass in this value.

Describe alternatives you've considered Right now I have to subclass this class and pass it in

Additional context I am happy to implement this and contribute to the codebase.