feat: licenses administration basic authentication.

feat: accounts slug.
feat: duplicate accounts_balance table and merge balance with accounts table.
feat: refactoring customers and vendors.
feat: system user soft deleting.
feat: preventing build tenant database without any subscription.
feat: remove 'password' property from 'req.user' object.
feat: refactoring JournalPoster class.
feat: delete duplicated directories and files.

server/config/config.js

@@ -81,4 +81,9 @@ module.exports = {
     prefix: '/api'
   },
   resetPasswordSeconds: 600,
+
+  licensesAuth: {
+    user: 'admin',
+    password: 'admin',
+  }
 };