Updated seed file

db/seeds.rb

@@ -23,7 +23,9 @@ students = []
 5.times do
   firstname = Faker::Name.unique.first_name.delete(" ")
   lastname = Faker::Name.unique.last_name.delete(" ")
-  students << User.new(email: firstname + "." + lastname + "@student.hs-rm.de", firstname: firstname, lastname: lastname, password_digest: BCrypt::Password.create("password"), verified: true)
+  email=firstname + "." + lastname + "@student.hs-rm.de"
+  email.delete(" ")
+  students << User.new(email: email, firstname: firstname, lastname: lastname, password_digest: BCrypt::Password.create("password"), verified: true)
   students.last.save!
 end