@type account_holder() :: %{
  optional(:account) => String.t() | nil,
  optional(:customer) => String.t() | nil,
  optional(:customer_account) => String.t() | nil,
  optional(:type) => String.t() | nil,
  optional(String.t()) => term()
}

• account - The ID of the Stripe account whose accounts you will retrieve. Only available when type is account. Max length: 5000.
• customer - The ID of the Stripe customer whose accounts you will retrieve. Only available when type is customer. Max length: 5000.
• customer_account - The ID of Account representing a customer whose accounts you will retrieve. Only available when type is customer. Max length: 5000.
• type - Type of account holder to collect accounts for. Possible values: account, customer.

@type filters() :: %{
  optional(:account_subcategories) => [String.t()] | nil,
  optional(:countries) => [String.t()] | nil,
  optional(String.t()) => term()
}

• account_subcategories - Restricts the Session to subcategories of accounts that can be linked. Valid subcategories are: checking, savings, mortgage, line_of_credit, credit_card.
• countries - List of countries from which to collect accounts.

@type t() :: %Stripe.Params.FinancialConnections.SessionCreateParams{
  account_holder: account_holder(),
  expand: [String.t()] | nil,
  filters: filters() | nil,
  permissions: [String.t()],
  prefetch: [String.t()] | nil,
  return_url: String.t() | nil
}

• account_holder - The account holder to link accounts for.
• expand - Specifies which fields in the response should be expanded.
• filters - Filters to restrict the kinds of accounts to collect.
• permissions - List of data features that you would like to request access to.

Possible values are balances, transactions, ownership, and payment_method.

• prefetch - List of data features that you would like to retrieve upon account creation.
• return_url - For webview integrations only. Upon completing OAuth login in the native browser, the user will be redirected to this URL to return to your app. Max length: 5000.