feat: Automate Postgreql password auth

infrastructure/modules/postgresql-flexible/main.tf

@@ -20,7 +20,7 @@ resource "azurerm_postgresql_flexible_server" "postgresql_flexible_server" {
   }
 
   administrator_login    = length(var.administrator_login) > 0 && var.password_auth_enabled ? var.administrator_login : null
-  administrator_password = length(var.administrator_login) > 0 && var.password_auth_enabled ? random_password.admin_password[0] : null
+  administrator_password = length(var.administrator_login) > 0 && var.password_auth_enabled ? random_password.admin_password[0].result : null
 
   # Postgres Flexible Server does not support User Assigned Identity
   # so do not enable for now. If required, create the identity in an
@@ -45,7 +45,7 @@ resource "azurerm_key_vault_secret" "db_admin_pwd" {
   count = length(var.administrator_login) > 0 && var.password_auth_enabled ? 1 : 0
 
   name         = var.key_vault_admin_pwd_secret_name
-  value        = resource.random_password.admin_password
+  value        = resource.random_password.admin_password[0].result
   key_vault_id = var.key_vault_admin_pwd_secret_name
 }