Geting Error: Request Failed with status code of 422 on unregister ionic Push

ionic-v1
1

Hi. I register ionic Push and on push.unregister() i’m getting error: Request Failed with status code of 422.

@auth.submitLogin(data)
      .then (user) =>
        @registerToken(user).then (token) =>
          @push.saveToken(token,'ignore_user': true)

        d.resolve(user)
      .catch ->
        d.reject('Login failed')

@push.unregister().catch (error) ->
      console.log(error)