feat: use username instead of uid (#1977)

* #1916 replace userId to username

* resolve

---------

Co-authored-by: Александр Тумайкин <AATumaykin@tsum.ru>

test/server/system_test.go

@@ -32,7 +32,6 @@ func TestSystemServer(t *testing.T) {
 	status, err = s.getSystemStatus()
 	require.NoError(t, err)
 	require.Equal(t, user.ID, status.Host.ID)
-	require.Equal(t, user.Username, status.Host.Username)
 }
 
 func (s *TestingServer) getSystemStatus() (*apiv1.SystemStatus, error) {