fixed #135
removed os
removed random var
Add force authentication option
fixed #135
removed os
removed random var
Add force authentication option
Merge branch 'prompt_auth' of github.com:Cal-CS-61A-Staff/ok into prompt_auth
Merge branch 'master' into prompt_auth
Merge branch 'prompt_auth' of github.com:Cal-CS-61A-Staff/ok into prompt_auth
Merge pull request #137 from Cal-CS-61A-Staff/prompt_auth

Prompt auth