error/forcepasswordchangenotice on New User Creation via web service

Hi Guys,
I am creating a new User via Webservice. 
My new user has following attributes -

{
"username":"newuser1",
"password":"Neel@123",
"firstname":"Neel",
"lastname":"Bhave",
"email":"b@c.com"
}

However, when I submit it through GET request, I get the following response -

{
    "exception": "moodle_exception",
    "errorcode": "forcepasswordchangenotice",
    "message": "error/forcepasswordchangenotice"
}

How do I solve this ? Thanks in advance.