NEW: user accounts (#3)

lib/mix/tasks/planner.register.ex

@@ -0,0 +1,20 @@
+defmodule Mix.Tasks.Planner.Register do
+  use Mix.Task
+
+  alias Planner.Accounts
+
+  @shortdoc "Register a new Planner user"
+
+  def run([email, password]) do
+    Mix.Task.run("app.start")
+
+    case Accounts.register_user(%{email: email, password: password}) do
+      {:ok, _} ->
+        Mix.shell().info("User created successfully.")
+
+      {:error, %Ecto.Changeset{} = changeset} ->
+        IO.inspect(changeset)
+        Mix.shell().error("There was a problem.")
+    end
+  end
+end