public function register(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'name' => [ 'required', 'string', 'max:70'],
            'mobile_no' => [ 'required', 'digits:11', 'unique:users'],
            'password' => ['required', 'string', 'min:8','max:20' ,'confirmed'],
            'area_id' => ['required', 'exists:areas,id'],
            'address' => [ 'required', 'string', 'max:150'],
        ]);

        if($validator->fails()){
            return $this->sendError($validator->errors(),'Validation Error.');
        }

        $input = $request->except('c_password');
        $user = $this->create($input);
        $success['token'] =  $user->createToken('MyApp')->accessToken;
        $success['name'] =  $user->name;

        //send verification code to user mobile
        event(new UserRegistered($user));
        return $this->sendResponse($success, 'User register successfully.');
    }