Azure Synapse Workspace do not have Azure active directory (AAD) configured, this may lead to unauthorized access.
In Azure Console -
In Terraform -
References:
https://learn.microsoft.com/en-us/azure/synapse-analytics/sql/active-directory-authentication
https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/synapse_workspace#aad_admin