my config

in the group

source:
    plugin: url
    data_fetcher_plugin: http
    authentication:
      plugin: basic
      username: bla
      password: bla
    data_parser_plugin: json
    
in the migration

source:
  urls: '<url-here>'
  ids:
    key:
      type: integer
      unsigned: true
  item_selector: data/
  fields: <lots of field definitions her>