Can you test for a null password?

Question

I have users who authenticate using Twitter and Facebook (using the Social Login add-on). Those users have no password.

Is this something I can test for using ExpressionEngine logic?

The obvious suspects don't seem to work, but it's not terribly surprising:

{if password != ""}password == yes{/if}
{if password}password == yes{/if}

Answer 1

From their Docs:

The contents of {password_block} is displayed only when password is empty.

So {password_block} password == no{/password_block} should do the trick inside the exp:social_login:add_userdata tag.