Logout all sessions when changing password
Logout all sessions when changing password

Closes #149
Phoenix1369/site,DMOJ/site,Phoenix1369/site,monouno/site,monouno/site,Minkov/site,Minkov/site,Phoenix1369/site,Minkov/site,monouno/site,Minkov/site,DMOJ/site,monouno/site,DMOJ/site,monouno/site,DMOJ/site,Phoenix1369/site