SQLSTATE[42P01]: Undefined table when try to create new user – Laravel

i’m new in laravel php and i try to create a new user with api post request and when i send this request i have a porblem when i do it
I use psgql and laravel 9. i use that
link to do this and custom somthing

This is my code:
i has User model like

class User extends Authenticatable
{
    use HasApiTokens,HasFactory, Notifiable;

    public $timestamps = false;
    protected $table = 'user';

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'first_name',
        'last_name',
        'email',
        'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password',
        'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];


}

and here is my AuthController to create new user

class AuthController extends Controller
{
    /**
     *  Create User
     * @param Request $request
     * @return User|IlluminateHttpJsonResponse
     */
    public function createUser(Request $request){
        try{
            $validateUser = Validator::make($request->all(),[
                'first_name'=>'required',
                'last_name'=>'required',
                'email'=>'required|email|unique:users,email',
                'password'=>'required'
            ]);

            if($validateUser->fails()){
                return response()->json([
                    'status'=>false,
                    'message'=>'validation error',
                    'errors'=>$validateUser->errors()
                ],401);
            }
            $user = User::create([
                'first_name'=>$request->first_name,
                'last_name'=>$request->last_name,
                'email'=>$request->email,
                'password'=> Hash::make($request->password)
            ]);
            return response()->json([
                'status'=>true,
                'message'=>'User created successfully',
                'token'=>$user->createToken("API TOKEN")->plainTextToken
            ],200);
        }
        catch (Throwable $th){
            return response()->json([
                'status'=>false,
                'message'=>$th->getMessage()
            ],500);
        }

    }
}

and i got problem when i send post request json
like

{
    "status": false,
    "message": "SQLSTATE[42P01]: Undefined table: 7 ERROR:  relation "users" does not existnLINE 1: select count(*) as aggregate from "users" where "email" = $1n                                          ^ (SQL: select count(*) as aggregate from "users" where "email" = [email protected])"
}

please help me