Laravel Data Save Error SQLSTATE[HY000]: General error: 1364

[hashan]

SQLSTATE[HY000]: General error: 1364 Field 'username' doesn't have a default value (SQL: insert into registerusers (updated_at, created_at) values (2019-07-15 12:03:06, 2019-07-15 12:03:06))
menna me error eka enwa, data base ekata data sav krnna giama.

public function storeRegister(Request $request)
{
$registeruser = new registeruser;
$request->all();
$registeruser->save();
}

[dev_lak]

usernam ekyna field ekt value ekak naha kyla kyanne oya

[dev_lak]

oyage code eke RegisterUser kyna model eke new object ekk hdnwa witarai, ekata values add krnne nha oya ekai error ekk enne, mehema try krnna

registeruser::create($request->all());