fix: Add README entry for new task

README.md

@@ -41,6 +41,13 @@ if you are using sidekiq scheduler you can use the following configuration:
     queue: scheduled
 ```
 
+### Block already marked users
+
+If you want to block already marked users, you can use the following command:
+```bash
+bundle exec rake decidim:spam_detection:block_users
+```
+
 ### Further configuration
 list of env var, default value and their usage:
 ```

spec/lib/tasks/decidim_block_user_spec.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+require "spec_helper"
+
+describe "decidim:spam_detection:block_users", type: :task do
+  it "preloads the Rails environment" do
+    expect(task.prerequisites).to include "environment"
+  end
+
+  it "runs gracefully" do
+    expect { task.execute }.not_to raise_error
+  end
+
+  it "performs the job" do
+    expect(Decidim::SpamDetection::BlockUsersJob).to receive(:perform_later)
+
+    task.execute
+  end
+end