tests: add user events controller tests.

test/factories/user_session.rb

@@ -0,0 +1,7 @@
+FactoryBot.define do
+  factory(:user_session) do
+    ip_addr { create(:ip_geolocation).ip_addr }
+    session_id { SecureRandom.hex(32) }
+    user_agent { "Mozilla/5.0" }
+  end
+end