update documentation to reflect module changes

plugins/modules/ec2_snapshot.py

@@ -70,6 +70,40 @@
     required: false
     default: 0
     type: int
+  reset_create_volume_permission:
+    description:
+      - If set to I(true), ec2 snapshot's createVolumePermissions is set to 'private'.
+      - Mutually exclusive with I(modify_create_volume_permission).
+    required: false
+    default: false
+    type: bool
+  modify_create_volume_permission:
+    description:
+      - If set to I(true), ec2 snapshot's createVolumePermissions is can be modified.
+      - Mutually exclusive with I(reset_create_volume_permission).
+      - Must specify I(permission_operation_type) to add or remove createVolumePermissions.
+    required: false
+    default: false
+    type: bool
+  permission_operation_type:
+    description:
+      - Whether to add or remove createVolumePermission.
+      - Set to I(add) to add permissions and set to I(remove) to remove permissions.
+      - Must specify either I(user_ids) or I(group_names) to add or remove permissions.
+    required: false
+    type: str
+  group_names:
+    description:
+      - The group to be added or removed. The possible value is all.
+      - Mutually exclusive with I(user_ids).
+    required: false
+    type: str
+  user_ids:
+    description:
+      - The account user IDs to be added or removed. The possible value is all.
+      - Mutually exclusive with I(group_names).
+    required: false
+    type: str
 author: "Will Thames (@willthames)"
 extends_documentation_fragment:
   - amazon.aws.common.modules
@@ -106,6 +140,28 @@
 - amazon.aws.ec2_snapshot:
     volume_id: vol-abcdef12
     last_snapshot_min_age: 60
+
+- name: Reset snapshot createVolumePermission
+  amazon.aws.ec2_snapshot:
+    snapshot_id: snap-06a6f641234567890
+    reset_create_volume_permission: true
+
+- name: Modify snapshot createVolmePermission to add user IDs
+  amazon.aws.ec2_snapshot:
+    snapshot_id: snap-06a6f641234567890
+    modify_create_volume_permission: true
+    permission_operation_type: add
+    user_ids:
+      - '123456789012'
+      - '098765432109'
+
+- name: Modify snapshot createVolmePermission to remove user ID
+  amazon.aws.ec2_snapshot:
+    snapshot_id: snap-06a6f641234567890
+    modify_create_volume_permission: true
+    permission_operation_type: remove
+    user_ids:
+      - '123456789012'
 """
 
 RETURN = r"""

plugins/modules/ec2_snapshot_info.py

@@ -194,6 +194,13 @@
             type: str
             returned: always
             sample: "arn:aws:kms:ap-southeast-2:123456789012:key/74c9742a-a1b2-45cb-b3fe-abcdef123456"
+        create_volume_permissions:
+            description:
+              - The users and groups that have the permissions for creating volumes from the snapshot.
+              - The module will return empty list if the create volume permissions on snapshot are 'private'.
+            type: list
+            elements: dict
+            sample: [{"group": "all"}]
 next_token_id:
     description:
     - Contains the value returned from a previous paginated request where C(max_results) was used and the results exceeded the value of that parameter.
@@ -233,7 +240,7 @@ def build_request_args(snapshot_ids, owner_ids, restorable_by_user_ids, filters,
 
 
 def get_snapshots(connection, module, request_args):
-    snapshot_ids = request_args.get("snapshot_ids")
+    snapshot_ids = request_args.get("SnapshotIds")
     try:
         snapshots = connection.describe_snapshots(aws_retry=True, **request_args)
     except is_boto3_error_code('InvalidSnapshot.NotFound') as e: