chore: update existing_resource_group_name default to null

solutions/fully-configurable/README.md

@@ -43,7 +43,7 @@ There is currently a [known issue](https://github.com/terraform-ibm-modules/terr
 | <a name="input_cbr_rules"></a> [cbr\_rules](#input\_cbr\_rules) | The list of context-based restriction rules to create for the instance.[Learn more](https://github.com/terraform-ibm-modules/terraform-ibm-scc-workload-protection/blob/main/solutions/fully-configurable/cbr-rules.md) | <pre>list(object({<br/>    description = string<br/>    account_id  = string<br/>    rule_contexts = list(object({<br/>      attributes = optional(list(object({<br/>        name  = string<br/>        value = string<br/>    }))) }))<br/>    enforcement_mode = string<br/>    tags = optional(list(object({<br/>      name  = string<br/>      value = string<br/>    })), [])<br/>    operations = optional(list(object({<br/>      api_types = list(object({<br/>        api_type_id = string<br/>      }))<br/>    })))<br/>  }))</pre> | `[]` | no |
 | <a name="input_cspm_enabled"></a> [cspm\_enabled](#input\_cspm\_enabled) | Enable Cloud Security Posture Management (CSPM) for the Workload Protection instance. This will create a trusted profile associated with the SCC Workload Protection instance that has viewer / reader access to the App Config service and viewer access to the Enterprise service. [Learn more](https://cloud.ibm.com/docs/workload-protection?topic=workload-protection-about). | `bool` | `true` | no |
 | <a name="input_existing_monitoring_crn"></a> [existing\_monitoring\_crn](#input\_existing\_monitoring\_crn) | To collect and analyze metrics and security data on hosts using both Monitoring and Workload Protection, pass the CRN of an existing IBM Cloud Monitoring instance to create a connection between instances. Both instances must be in the same region. | `string` | `null` | no |
-| <a name="input_existing_resource_group_name"></a> [existing\_resource\_group\_name](#input\_existing\_resource\_group\_name) | The name of a an existing resource group in which to provision resources to. | `string` | `"Default"` | no |
+| <a name="input_existing_resource_group_name"></a> [existing\_resource\_group\_name](#input\_existing\_resource\_group\_name) | The name of an existing resource group to provision the resources. If not provided the default resource group will be used. | `string` | `null` | no |
 | <a name="input_ibmcloud_api_key"></a> [ibmcloud\_api\_key](#input\_ibmcloud\_api\_key) | The IBM Cloud API key to deploy resources. | `string` | n/a | yes |
 | <a name="input_ibmcloud_resource_controller_api_endpoint"></a> [ibmcloud\_resource\_controller\_api\_endpoint](#input\_ibmcloud\_resource\_controller\_api\_endpoint) | The IBM Cloud [resource controller endpoint](https://cloud.ibm.com/apidocs/resource-controller/resource-controller#endpoint-url) to use. This is used to update the Workload Protection instance to enable CSPM once the trusted profiles have been created. | `string` | `"https://private.us-south.resource-controller.cloud.ibm.com"` | no |
 | <a name="input_prefix"></a> [prefix](#input\_prefix) | The prefix to be added to all resources created by this solution. To skip using a prefix, set this value to null or an empty string. The prefix must begin with a lowercase letter and may contain only lowercase letters, digits, and hyphens '-'. It should not exceed 16 characters, must not end with a hyphen('-'), and can not contain consecutive hyphens ('--'). Example: prod-scc-wp. | `string` | n/a | yes |

solutions/fully-configurable/variables.tf

@@ -10,8 +10,8 @@ variable "ibmcloud_api_key" {
 
 variable "existing_resource_group_name" {
   type        = string
-  description = "The name of a an existing resource group in which to provision resources to."
-  default     = "Default"
+  description = "The name of an existing resource group to provision the resources. If not provided the default resource group will be used."
+  default     = null
 }
 
 variable "existing_monitoring_crn" {