Chore: refactor to use new schema changing queries

lib/token-manager.js

@@ -0,0 +1,13 @@
+const db = require('./db')
+
+function getTokenList () {
+  const sql = `select * from user_tokens`
+  return db.$any(sql)
+}
+
+function revokeToken (token) {
+  const sql = `delete from user_tokens where token = $1`
+  return db.$none(sql, [token])
+}
+
+module.exports = { getTokenList, revokeToken }