Refactor customers API

* Use lodash camelize
* Modify enhanceOverrideFields (fp)
* Fix for sql timestamp
* Fetch all existing users at once in populateOverrideUsernames
* Modify populateOverrideUsernames (fp)
* Break format function into computeStatus, camelize

lib/users.js

@@ -1,3 +1,6 @@
+const _ = require('lodash/fp')
+const pgp = require('pg-promise')()
+
 const db = require('./db')
 
 function get (token) {
@@ -5,4 +8,9 @@ function get (token) {
   return db.oneOrNone(sql, [token])
 }
 
-module.exports = { get }
+function getByIds (tokens) {
+  const sql = 'select * from user_tokens where token in ($1^)'
+  const tokensClause = _.map(pgp.as.text, tokens).join(',')
+  return db.any(sql, [tokensClause])
+}
+module.exports = { get, getByIds }