Create account json throws error when email is passes as null in proxy address

[Prajna]

Hi Team,

We are using the below json for proxy address. But when the email is passed as null it throws attribute conversion error.

Can you please suggest a logic so that it will pass null value in email.

"proxyAddresses":[

        "${user.customproperty7.contains('EA01')? 'SMTP:'+user.email +',' + 'smtp:' + user.username + '@ausgriddev.com.au':''}",

        "${user.customproperty7.contains('2001')? 'SMTP:'+user.email +',' + 'smtp:' + user.username + '@plusesdev.com.au':''}"

],

[rushikeshvartak]

"proxyAddresses":[
"${user.customproperty7.contains('EA01') && user.email != null ? 'SMTP:'+user.email +',' + 'smtp:' + user.username + '@ausgriddev.com.au':''}",
"${user.customproperty7.contains('2001') && user.email != null ? 'SMTP:'+user.email +',' + 'smtp:' + user.username + '@plusesdev.com.au':''}"
]