  - create unique login token for each user   - optimize login_token generation
  - create unique login token for each user
  - optimize login_token generation

Conflicts:
	app/models/user.rb

sigmike/prime4commit,habibmasuro/peer4commit,habibmasuro/peer4commit,Gamecredits-Universe/code4gamecredits,vlajos/peer4commit,sigmike/prime4commit,sigmike/peer4commit,vlajos/peer4commit,sigmike/peer4commit,sigmike/prime4commit,vlajos/peer4commit,Gamecredits-Universe/code4gamecredits,sigmike/peer4commit,husthub/coffee,Gamecredits-Universe/code4gamecredits,habibmasuro/peer4commit,husthub/coffee