Unable to log in

hi i am building a social network with Laravel but even though i log in it always says that the password is wrong but it is correct i think the problem is in the following part of code, please show me the error?

 public function getsignin()
 {
     return view('auth.signin');
 }

 public function postsignin(Request $request)
 {
     $this->validate($request, [
        'email'=>'required',
        'password'=>'required'
     ]);

     if( !Auth::attempt($request->only(['email','password']), $request->has('remember'))) {
         return redirect()->back()->with('info','Whoops! Try again please...');
     }

     return redirect()->route('home')->with('info','Welcome!');
}