@type t() :: %ExNylas.Application.HostedAuthentication{
  alignment: (:left | :center | :right) | nil,
  background_color: String.t() | nil,
  background_image_url: String.t() | nil,
  color_primary: String.t() | nil,
  color_secondary: String.t() | nil,
  spacing: integer() | nil,
  subtitle: String.t() | nil,
  title: String.t() | nil
}