SQL select if row into joined table is empty

[Initmax Initmax]

Have 2 tables T1 and T2 Does slick 3.0 has any variants select all rows from T1 if into T2 related row does not exists ? 

for example

table user
id---name
1     A
2     B

task
id----idUser
1       1

result == 2,B 

Tried with joinLeft 

myQ.joinLeft(my2Q).filter(el => el._2.isEmpty).groupBy(p => p._1).map(_._1)

but without success 

BR!