fix: login email should be case insensitive (#1911)

Author: Yukaii

lib/auth/email/index.js

@@ -2,6 +2,7 @@
 
 const Router = require('express').Router
 const passport = require('passport')
+const sequelize = require('sequelize')
 const validator = require('validator')
 const LocalStrategy = require('passport-local').Strategy
 const config = require('../../config')
@@ -21,7 +22,10 @@ passport.use(new LocalStrategy({
   try {
     const user = await models.User.findOne({
       where: {
-        email: email
+        email: sequelize.where(
+          sequelize.fn('LOWER', sequelize.col('email')),
+          email.toLowerCase()
+        )
       }
     })