If you want to start the bot without the querylogin, add to the startup script -noquery.
Example:
Normal start without Screen:
./TS3MusicBot_runscript.sh -account mail@mail.com -port 8080 -webif-pw ADMIN_PASSWORD -webif-pw-user USER_PASSWORD -noquery
Start in Screen:
screen -d -m ./TS3MusicBot_runscript.sh -account b.geddert@geddert.it -port 8080 -webif-pw ADMIN_PASSWORD -webif-pw-user USER_PASSWORD -noquery