Use email instead username when user register

Ok I found a solution:

1) Create a new Auto-Action Field like this:

Trigger: onAfterUserRegistration
Users: Automatic
Access: Everybody
Conditional: none except if needed
Operator: Set
Value: keep this field empty (for delete the value composed by formatname who is generated by CB)

2) Then Create another new Auto-Action Field like this:

Trigger: onAfterUserRegistration
Users: Automatic
Access: Everybody
Conditional: none except if needed
Operator: Set
Value: [firstname][user_id]

Is necessary to take care to put the first action before the second otherwise this will not work.

Can you please just confirm this setup is fine and will not have any side effect ?

thank

Why are you clearing the username before setting the username? I don't understand why the first action is necessary.

sorry you reply to me during I write my solution. IN fact you right is not necessary to setup two action...one is sufficient.

- Create a new Auto-Action Field like this:

Trigger: onAfterUserRegistration
Users: Automatic
Access: Everybody
Conditional: none except if needed
Operator: Set
Value: [firstname][user_id]

Yup, that looks fine.