Create a Registrant auth controller

test/system/api/registrant/registrant_api_authentication_test.rb

@@ -0,0 +1,24 @@
+require 'test_helper'
+
+class RegistrantApiAuthenticationTest < ApplicationSystemTestCase
+  def setup
+    super
+
+  end
+
+  def teardown
+    super
+
+  end
+
+  def test_request_creates_user_when_one_does_not_exist
+    params = {
+      ident: "30110100103",
+      first_name: "Jan",
+      last_name: "Tamm",
+      country: "ee",
+    }
+
+    post '/api/v1/registrant/auth/eid', params
+  end
+end