Validate that the password and password confirmation match.

This check is only performed when the confirmation_required? DSL option is set to true.

You can use this validation in your own actions where you want to validate that the password and the password confirmation arguments match. If you're not using one of the actions generated by the password strategy then you'll need to manually pass the strategy name in the changeset context. Eg:

Changeset.new(user, %{})
|> Changeset.set_context(%{strategy_name: :password})
|> Changeset.for_update(:change_password, params)
|> Accounts.update()

or by adding it statically in your action definition:

update :change_password do
  change set_context(%{strategy_name: :password})
  change AshAuthentication.Strategy.Password.HashPasswordChange
end