All about user login

Not runnable at the moment

setup/knex/migrations/20170617123450_create_user_name.js

@@ -1,6 +1,8 @@
 exports.up = function(knex, Promise) {
     return knex.schema.table('users', table => {
-        table.string('name').notNullable().default('');
+        // name and password can be null in case of LDAP login
+        table.string('name');
+        table.string('password').alter();
     })
     .then(() => knex('users').where('id', 1).update({
         name: 'Administrator'