Add user seed

db/seeds.rb

@@ -14,3 +14,10 @@ p = Person.create!(
   email: 'maarten@maartenberg.nl.eu.org',
   is_admin: true
 )
+
+u = User.create!(
+  email: 'maarten@maartenberg.nl.eu.org',
+  person: p,
+  password: 'damena123',
+  password_confirmation: 'damena123'
+)