Loguin whit name not email

I need to login with "name" not with "email"...

Change Username in Main> Settings>User | >Email >from allmain@google.com to allmain

I'm talking about the tracking platform, you? in the login I need to enter with "name" not "email" ...

I know that if in "email" I put "allmain" I start with "allmain" ... I need to start with the name I put in "name" ...

Dont know if possible; but in conf i saw :

    <entry key='database.loginUser'>
        SELECT * FROM tc_users
        WHERE email = :email OR login = :email
    </entry>

Maybe you can fiddle with that...

I need it for an employee to connect but notifications reach the boss... I will analyze what you say ... thanks