Changes to Buscar Customer por identificadores externos

the response property external_id became optional for the status 200

the default_receipt_type response's property type changed from string to no type for status 200

removed the required property error from the response with the 404 status

removed the optional property error/body from the response with the 422 status

removed the optional property error/details from the response with the 422 status

api operation id get_customers-lookup removed and replaced with lookup_customer

api tag Customers added

added the new optional header request parameter x-account-key

added the new optional header request parameter x-api-version

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 429

added ReceiptType to the default_receipt_type response property allOf list for the response status 200

the response property error/code became required for the status 422

the response property error/message became required for the status 422

the response property id became required for the status 200

the default_receipt_type response's property default value bill was added for the status 200

the send_mail response's property default value false was added for the status 200

added the required property code to the response with the 404 status

added the required property message to the response with the 404 status