feat: support additional/configurable users (#13)

* feat(additional_users): supported

* feat(admin): make optional

* chore(readme): update docs for new vars

README.md

@@ -166,11 +166,13 @@ Available targets:
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br/>This is for some rare cases where resources want additional configuration of tags<br/>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
+| <a name="input_additional_users"></a> [additional\_users](#input\_additional\_users) | List of additional users to create for the MemoryDB cluster | `list(string)` | `[]` | no |
 | <a name="input_admin_password"></a> [admin\_password](#input\_admin\_password) | The password for the MemoryDB user. If empty, a random password will be generated. | `string` | `""` | no |
 | <a name="input_admin_username"></a> [admin\_username](#input\_admin\_username) | The username for the MemoryDB admin | `string` | `"admin"` | no |
 | <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br/>in the order they appear in the list. New attributes are appended to the<br/>end of the list. The elements of the list are joined by the `delimiter`<br/>and treated as a single ID element. | `list(string)` | `[]` | no |
 | <a name="input_auto_minor_version_upgrade"></a> [auto\_minor\_version\_upgrade](#input\_auto\_minor\_version\_upgrade) | Indicates that minor engine upgrades will be applied automatically to the cluster during the maintenance window | `bool` | `true` | no |
 | <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br/>See description of individual variables for details.<br/>Leave string and numeric variables as `null` to use default value.<br/>Individual variable settings (non-null) override settings in context object,<br/>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br/>  "additional_tag_map": {},<br/>  "attributes": [],<br/>  "delimiter": null,<br/>  "descriptor_formats": {},<br/>  "enabled": true,<br/>  "environment": null,<br/>  "id_length_limit": null,<br/>  "label_key_case": null,<br/>  "label_order": [],<br/>  "label_value_case": null,<br/>  "labels_as_tags": [<br/>    "unset"<br/>  ],<br/>  "name": null,<br/>  "namespace": null,<br/>  "regex_replace_chars": null,<br/>  "stage": null,<br/>  "tags": {},<br/>  "tenant": null<br/>}</pre> | no |
+| <a name="input_create_admin_user"></a> [create\_admin\_user](#input\_create\_admin\_user) | Indicates whether to create an admin user for the MemoryDB cluster | `bool` | `true` | no |
 | <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br/>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
 | <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br/>Map of maps. Keys are names of descriptors. Values are maps of the form<br/>`{<br/>   format = string<br/>   labels = list(string)<br/>}`<br/>(Type is `any` so the map values can later be enhanced to provide additional options.)<br/>`format` is a Terraform format string to be passed to the `format()` function.<br/>`labels` is a list of labels, in order, to pass to `format()` function.<br/>Label values will be normalized before being passed to `format()` so they will be<br/>identical to how they appear in `id`.<br/>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
 | <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
@@ -188,6 +190,7 @@ Available targets:
 | <a name="input_num_replicas_per_shard"></a> [num\_replicas\_per\_shard](#input\_num\_replicas\_per\_shard) | The number of replicas per shard | `number` | `1` | no |
 | <a name="input_num_shards"></a> [num\_shards](#input\_num\_shards) | The number of shards in the cluster | `number` | `1` | no |
 | <a name="input_parameter_group_family"></a> [parameter\_group\_family](#input\_parameter\_group\_family) | The name of the parameter group family | `string` | `"memorydb_redis6"` | no |
+| <a name="input_parameter_group_name"></a> [parameter\_group\_name](#input\_parameter\_group\_name) | The name of the parameter group to associate with this cluster. | `string` | `null` | no |
 | <a name="input_parameters"></a> [parameters](#input\_parameters) | Key-value mapping of parameters to apply to the parameter group | `map(string)` | `{}` | no |
 | <a name="input_port"></a> [port](#input\_port) | The port on which the cluster accepts connections | `number` | `6379` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |