Terraform airbyte_source_gcs resource

[SVZh]

I'm trying to make Terraform source of airbyte_source_gcs type, but when I hit apply it, I'm encountering this error:

╷
│ Error: failure to invoke API
│ 
│   with airbyte_source_gcs.example_name,
│   on sources.tf line 1, in resource "airbyte_source_gcs" "example_name":
│    1: resource "airbyte_source_gcs" "example_name" {
│ 
│ unknown status code returned: Status 422
│ {"status":422,"type":"https://reference.airbyte.com/reference/errors#unprocessable-entity","title":"unprocessable-entity","detail":"The body of the request was not understood","documentationUrl":null,"data":{"message":"json schema
│ validation failed when comparing the data to the json schema. \nErrors: $: required property 'credentials' not found "}}
╵

Looks like something is wrong in credentials routine. Is there any way to configure it properly?
I'm using self-hosted Airbyte 0.63.8, Terraform 1.10.5, Airbyte provider 0.6.5

Source is configured like this (I omitted sensitive places like format or service account or schema).

resource "airbyte_source_gcs" "example_name" {
  name         = "Example Name"
  workspace_id = var.airbyte_workspace_id

  configuration = {
    bucket = " ... "
    service_account = base64decode(" base64-encoded service account key here ")
    start_date      = null
    streams : [
      {
        name = "subscriptions"
        "globs" : [
          "subscriptions/*.csv"
        ]
        days_to_sync_if_history_is_full = 0
        schemaless                      = false
        validation_policy               = "Emit Record"

        input_schema = jsonencode({ ... })

        format = { ... }
      }
    ]
  }
}