fix: add missed billing_account_id variable (#2)

Author: SweetOps

README.md

@@ -15,22 +15,22 @@ module "my_awesome_project" {
 
 ## Inputs
 
-
 | Name                       | Description                                                                                     |  Type  |  Default  | Required |
 |:---------------------------|:------------------------------------------------------------------------------------------------|:------:|:---------:|:--------:|
 | name                       | Solution name, e.g. 'app' or 'jenkins'                                                          | string |    n/a    |   yes    |
 | namespace                  | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'             | string |    n/a    |   yes    |
 | stage                      | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'         | string |    n/a    |   yes    |
-| attributes                 | Additional attributes (e.g. `1`)                                                                |  list  |   `[]`    |    no    |
+| attributes                 | Additional attributes (e.g. `1`)                                                                |  list  | `<list>`  |    no    |
 | auto_create_network        | Create the 'default' network automatically                                                      | string | `"true"`  |    no    |
-| context                    | Default context to use for passing state between label invocations                              |  map   |   `{}`    |    no    |
+| billing_account_id         | The alphanumeric ID of the billing account this project belongs to                              | string |   `""`    |    no    |
+| context                    | Default context to use for passing state between label invocations                              |  map   |  `<map>`  |    no    |
 | delimiter                  | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`       | string |   `"-"`   |    no    |
 | enable_deletion_protection | If true, the Terraform resource can be deleted without deleting the Project via the Google API. | string | `"false"` |    no    |
 | enabled                    | Set to false to prevent the module from creating any resources                                  | string | `"true"`  |    no    |
 | environment                | Environment, e.g. 'prod', 'staging', 'dev', 'pre-prod', 'UAT'                                   | string |   `""`    |    no    |
 | folder_id                  | The numeric ID of the folder this project should be created under                               | string |   `""`    |    no    |
 | org_id                     | The numeric ID of the organization this project belongs to                                      | string |   `""`    |    no    |
-| tags                       | Additional tags (e.g. `map('BusinessUnit','XYZ')`                                               |  map   |   `{}`    |    no    |
+| tags                       | Additional tags (e.g. `map('BusinessUnit','XYZ')`                                               |  map   |  `<map>`  |    no    |
 
 ## Outputs
 

main.tf

@@ -20,4 +20,5 @@ resource "google_project" "default" {
   folder_id           = "${var.folder_id}"
   skip_delete         = "${var.enable_deletion_protection}"
   auto_create_network = "${var.auto_create_network}"
+  billing_account     = "${var.billing_account_id}"
 }

variables.tf

@@ -68,3 +68,8 @@ variable "auto_create_network" {
   default     = "true"
   description = "Create the 'default' network automatically"
 }
+
+variable "billing_account_id" {
+  description = "The alphanumeric ID of the billing account this project belongs to"
+  default     = ""
+}