Add the task to sync authors from the API.

test/decentralised_book_index/sync/sync_tasks/sync_authors_task_test.exs

@@ -0,0 +1,20 @@
+defmodule DecentralisedBookIndex.SyncTasks.SyncAuthorsTaskTest do
+  use DecentralisedBookIndex.DataCase
+
+  alias DecentralisedBookIndex.SyncTasks.SyncAuthorsTask
+  alias DecentralisedBookIndex.Metadata
+
+  alias DecentralisedBookIndex.TestEndpoints
+  @test_server_endpoint TestEndpoints.test_api_endpoint()
+
+  describe "sync authors tasks" do
+    test "sync authors" do
+      {:ok, author} = Metadata.create_author("Author", "An description")
+      {:ok, author} = Metadata.create_author("Author2", "An description")
+
+      endpoint = @test_server_endpoint
+
+      assert endpoint = SyncAuthorsTask.sync(endpoint)
+    end
+  end
+end