📃 feat: add list-balances, remove-user, and improve User scripts (#1418)

* Refactoring opening of DB to config/helpers.js

* Adding two user scripts:

- 'delete-user' to remove a user definitely
- 'list-balances' to show the balances of all the users

config/list-balances.js

@@ -0,0 +1,39 @@
+const path = require('path');
+require('module-alias')({ base: path.resolve(__dirname, '..', 'api') });
+const { connectWithTimeout, silentExit } = require('./helpers');
+const Balance = require('~/models/Balance');
+const User = require('~/models/User');
+
+(async () => {
+  await connectWithTimeout();
+
+  /**
+   * Show the welcome / help menu
+   */
+  console.purple('-----------------------------');
+  console.purple('Show the balance of all users');
+  console.purple('-----------------------------');
+
+  let users = await User.find({});
+  for (const user of users) {
+    let balance = await Balance.findOne({ user: user._id });
+    if (balance !== null) {
+      console.green(`User ${user.name} has a balance of ${balance.tokenCredits}`);
+    } else {
+      console.yellow(`User ${user.name} has no balance`);
+    }
+  }
+
+  silentExit(0);
+})();
+
+process.on('uncaughtException', (err) => {
+  if (!err.message.includes('fetch failed')) {
+    console.error('There was an uncaught error:');
+    console.error(err);
+  }
+
+  if (!err.message.includes('fetch failed')) {
+    process.exit(1);
+  }
+});