Crash on null Magister

[Z3r0byte]

Stacktrace:

Build version: 1.0.8 

Build date: 2016-09-01 15:56:04 
Current date: 2016-09-01 19:12:15 
Device: Samsung SM-G920F 

Stack trace:  
java.lang.NullPointerException: Attempt to invoke virtual method 'void net.ilexiconn.magister.Magister.logout()' on a null object reference
 at com.z3r0byte.magis.Fragments.LoginFragment$3.run(LoginFragment.java:283)
 at java.lang.Thread.run(Thread.java:818)