Devise sign-up request method post using Postman - ruby-on-rails

Question

I created an only API rails project and added devise user model
now I am trying to sign-up using Postman but it does not save the new user on the
database
however, it does not return an error as well.
Postman post request and parameters passed
My app controller with the additional permitted attributes
`class ApplicationController < ActionController::API
before_action :configure_permitted_parameters, if: :devise_controller?
protected
def configure_permitted_parameters
attributes = :name, { roles: [] }
devise_parameter_sanitizer.permit(:sign_up, keys: attributes)
devise_parameter_sanitizer.permit(:account_update, keys: attributes)
end
end`
Devise User model with validations
`class User < ApplicationRecord
# Include default devise modules. Others available are:
# :confirmable, :lockable, :timeoutable, :trackable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :rememberable, :validatable
validates :name, presence: true
validates :password, presence: true
validates :email, presence: true
validates :roles, presence: true
has_many :reservations, dependent: :destroy
has_many :vechiles, through: :group_entities
end`
The migration file for the devise user table
class DeviseCreateUsers < ActiveRecord::Migration[7.0]
def change
create_table :users do |t|
t.string :name, null: false
## Database authenticatable
t.string :email, null: false, default: ""
t.string :encrypted_password, null: false, default: ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Rememberable
t.datetime :remember_created_at
## Trackable
# t.integer :sign_in_count, default: 0, null: false
# t.datetime :current_sign_in_at
# t.datetime :last_sign_in_at
# t.string :current_sign_in_ip
# t.string :last_sign_in_ip
## Confirmable
# t.string :confirmation_token
# t.datetime :confirmed_at
# t.datetime :confirmation_sent_at
# t.string :unconfirmed_email # Only if using reconfirmable
## Lockable
# t.integer :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
# t.string :unlock_token # Only if unlock strategy is :email or :both
# t.datetime :locked_at
t.timestamps null: false
end
add_index :users, :email, unique: true
add_index :users, :reset_password_token, unique: true
# add_index :users, :confirmation_token, unique: true
# add_index :users, :unlock_token, unique: true
end
end
Roles col. added to user table
class AddRolesToUsers < ActiveRecord::Migration[7.0]
def change
add_column :users, :roles, :text, array: true, default: []
end
end
My Routes.rb
# frozen_string_literal: true
Rails.application.routes.draw do
devise_for :users
# Define your application routes per the DSL in https://guides.rubyonrails.org/routing.html
resources :users, only: [:index]
# Defines the root path route ("/")
# root "articles#index"
end