API Automation jsonpath node issue

Hi All

SOAPUI PRO

API response has

[ { "username": "xyz", "password": "1234",

},

{ "username": "null", "password": "12344", },

{ "username": "AB1", "password": "123411", },

{ "username": "null", "password": "1234111", },

  {
  "username": "null",
  "password": "123",

} ]

Json node

JSON

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Now am trying to get the username from all the record which should not null

$.[*].[?(@.username)] And $..[?(@.username)]

Both assertion is not working

Guide me if u have a solution