fix conditions for rg

Author: sbaidachni

infra/main.tfvars.json

@@ -1,8 +1,9 @@
 {
+    "resource_group_name": "${RESOURCE_GROUP_NAME}",
     "location": "${AZURE_LOCATION}",
     "use_billing_policy": "${USE_BILLING_POLICY:-false}",
     "azd_environment_name": "${AZURE_ENV_NAME}",
-    "resource_share_user": "${RESOURCE_SHARE_USER}",
+    "resource_share_user": ${RESOURCE_SHARE_USER},
     "deploy_github_runner": "${DEPLOY_GITHUB_RUNNER:-false}",
     "enable_failover_github_runner": "${ENABLE_FAILOVER_GITHUB_RUNNER:-false}",
     "github_runner_config": {

infra/variables.tf

@@ -17,7 +17,7 @@ variable "resource_group_name" {
   description = "The name of an existing resource group to deploy resources into. If not provided, a new resource group will be created."
 
   validation {
-    condition     = var.resource_group_name == null || can(regex("^[a-zA-Z0-9._\\(\\)-]+$", var.resource_group_name))
+    condition     = var.resource_group_name == null || length(var.resource_group_name) == 0 || can(regex("^[a-zA-Z0-9._\\(\\)-]+$", var.resource_group_name))
     error_message = "Resource group name must contain only alphanumeric characters, periods, underscores, hyphens, and parentheses."
   }
 }