java.lang.IllegalStateException: Already logged in to server.
   at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:385)
   at org.jivesoftware.smack.XMPPConnection.connect(XMPPConnection.java:1426)
   at org.jivesoftware.smack.ReconnectionManager$2.run(ReconnectionManager.java:123)