Update README to more explicitly mention necessary to_s and email methods on User model
Update README to more explicitly mention necessary to_s and email methods on User model

Fixes #436

nikolaevav/forem,devleoper/forem,trakt/forem,daniely/forem,NOX73/forem,tomrc/forem,rubysherpas/forem,frankmarineau/forem,link-er/forem,zshannon/forem,zhublik/forem,amwelles/forem,jarray52/forem,RostDetal/forem,jaybrueder/forem,radar/forem,RostDetal/forem,bodrovis/forem,danman01/forem,hanspolo/forem,NOX73/forem,ketanjain/forem,brooks/forem,amwelles/forem,radar/forem,frankmarineau/forem,kenmazaika/forem,moh-alsheikh/forem,link-er/forem,kenmazaika/forem,rubysherpas/forem,wuwx/forem,trakt/forem,efrence/forem,daniely/forem,zshannon/forem,hepu/forem,hepu/forem,SamLau95/forem,jaybrueder/forem,ketanjain/forem,mauriciopasquier/forem,bodrovis/forem,tomkrus/forem,wesleycho/forem,danman01/forem,mhoad/forem,rubysherpas/forem,tomkrus/forem,frankmarineau/forem,mijoharas/forem,tomrc/forem,ascendbruce/forem,xenonn/forem,jaybrueder/forem,ketanjain/forem,mhoad/forem,radar/forem,devleoper/forem,moh-alsheikh/forem,jarray52/forem,ajeje/forem,wuwx/forem,SamLau95/forem,zhublik/forem,hanspolo/forem,devleoper/forem,efrence/forem,tomrc/forem,RostDetal/forem,wuwx/forem,ascendbruce/forem,mauriciopasquier/forem,zhublik/forem,wesleycho/forem,ajeje/forem,ajeje/forem,xenonn/forem,mijoharas/forem,efrence/forem,trakt/forem,nikolaevav/forem,hanspolo/forem,brooks/forem,nikolaevav/forem