feat: make organization domain field optional

docs/resources/organization.md

@@ -51,7 +51,7 @@ resource "keycloak_oidc_identity_provider" "this" {
 - `alias` - (Optional) The alias unique identifies the organization. Same as the name if not specified. The alias cannot be changed after the organization has been created.
 - `description` - (Optional) The description of the organization.
 - `redirect_url` - (Optional) The landing page after user completes registration or accepts an invitation to the organization. If left empty, the user will be redirected to the account console by default.
-- `domain` - (Required) A list of [domains](#domain-arguments). At least one domain is required.
+- `domain` - (Optional) A list of [domains](#domain-arguments).
 - `attributes` - (Optional) A map representing attributes for the group. In order to add multivalued attributes, use `##` to separate the values. Max length for each value is 255 chars.
 
 ### Domain arguments

provider/resource_keycloak_organization.go

@@ -56,8 +56,8 @@ func resourceKeycloakOrganization() *schema.Resource {
 			},
 			"domain": {
 				Type:     schema.TypeSet,
-				Required: true,
-				MinItems: 1,
+				Optional: true,
+				MinItems: 0,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
 						"name": {
@@ -104,9 +104,6 @@ func getOrganizationFromData(data *schema.ResourceData) (*keycloak.Organization,
 		}
 	}
 
-	if len(domains) == 0 {
-		return nil, fmt.Errorf("at least one domain is required")
-	}
 	organization.Domains = domains
 
 	attributes := map[string][]string{}