Workspace creation via terraform provider fails on AWS

[DevOps]

I'm trying to create a new workspace in a empty account. I have managed to create all the other resources without issues but when I try to create the workspace it fails with the following error:

Error: cannot create mws workspaces: MALFORMED_REQUEST: Invalid CredentialsId:

My config is the following:

resource "databricks_mws_workspaces" "db_landing_ws" {
  provider                 = databricks.accounts
  account_id               = var.databricks_account_id
  aws_region               = var.aws_region
  workspace_name           = "landing-${var.env_short}${var.aws_region_short}}"

  credentials_id           = databricks_mws_credentials.db_landing_ws_role.id
  storage_configuration_id = databricks_mws_storage_configurations.db_landing_ws_s3_bucket.id
  network_id               = databricks_mws_networks.db_landing_vpc.id
  token{
    comment = "Terraform"
  }
}

And the provider is configured as follows:

provider "databricks" {
  alias         = "accounts"
  host          = "https://accounts.cloud.databricks.com"
  account_id    = var.databricks_account_id
  client_id     = jsondecode(data.aws_secretsmanager_secret_version.databricks_secret_id.secret_string)["client_id"]
  client_secret = jsondecode(data.aws_secretsmanager_secret_version.databricks_secret_id.secret_string)["secret_id"]
}

Where I provide a service principal client and secret id via secrets manager.

I have tried different ways of configuring the provider ( with user and password ) but without any luck. Any suggestions would be greatly appreciated.

Thanks

Istvan C