post https://ads.nextdoor.com/v2/api/advertiser/create
Creates an advertiser that is tied to the NAM profile the API credentials are tied to. The "name" is a required input while "website_url", "category_id", and "address" are all optional inputs.
If "address" is passed in, then all inputs are required except for the "street_address_2" field which is optional; this represents additional information like an apartment or suite number.
Upon a successful creation this will return the advertiser object.