Can anyone tell me  the "main idea" of test 4 or type test. I got AV. Need some reason where is my mistake (to my mind - arrays, but need help). Thanks.

Try to do login or logout while no user is registered yet.

It work's properly. Can u give me 1-2 tests?

idk, try 100 register operations? 100 logins? 100 logouts? 1 register, 2 logins and 3 logouts? There aren't many possible cases really.

I know that there is a lot of variants (arrays). Thanks. I'll try to solve.