Possibility exists, however, you will have to change many files for this to work.
Open /conf/traccar.xml and add or modify:
<entry key='database.loginUser'>
SELECT * FROM tc_users
WHERE email = :email OR login = :email
</entry>
to:
<entry key='database.loginUser'>
SELECT * FROM tc_users
WHERE login = :email
</entry>
Hi Erick,
thank you for your hint. It realy seems to be a good idea to use column login of tc_users table. Unfortunately this column is not editable via the users screen. I will try name = :email so login will be possible via Username/Passwort.
Is there a possibility to change from email/password to username/password login?