Auth::attempt returning false (API)

I'm creating an API for a table called usuarios, everything went all right when i registered a new user through postman, but when I try to login, the Auth::attempt, passing a username(not an email) and a password, it returns false, returning code 401, Unauthorized. I think it is because i changed deleted the default users table and created a new one. Can anybody help me? Maybe if I changed the table and columns for Authentication it would work, but I don't know how to do it. Code for my AuthController:

class AuthController extends Controller
{
    public function signup(Request $request)
    {
        $request->validate([
            'nome' => 'required|string',
            'email' => 'required|string|email|unique:usuarios',
            'cpf' => 'required|string|unique:usuarios',
            'username' => 'required|string|unique:usuarios',
            'dtNasc' => 'string',
            'senha' => 'required|string|confirmed'
        ]);

        $user = new Usuario([
            'nome' => $request->nome,
            'email' => $request->email,
            'cpf' => $request->cpf,
            'username' => $request->username,
            'dtnasc' => $request->dtnasc,
            'senha' => Hash::make($request->senha)
        ]);

        $user->save();

        return response()->json([
            'message' => 'Successfully created user!'
        ], 201);
    }

    public function login(Request $request)
    {
        $request->validate([
            'username' => 'required|string',
            'senha' => 'required|string',
            'remember_me' => 'boolean'
        ]);


        $credentials = request(['username', 'senha']);

        if(!Auth::attempt($credentials))
            return response()->json([
                'message' => 'Unauthorized'
            ], 401);

        $user = $request->user();

        $tokenResult = $user->createToken('Personal Access Token');
        $token = $tokenResult->token;

        if ($request->remember_me)
            $token->expires_at = Carbon::now()->addWeeks(1);

        $token->save();

        return response()->json([
            'access_token' => $tokenResult->accessToken,
            'token_type' => 'Bearer',
            'expires_at' => Carbon::parse(
                $tokenResult->token->expires_at
            )->toDateTimeString()
        ]);
    }

    public function logout(Request $request)
    {
        $request->user()->token()->revoke();

        return response()->json([
            'message' => 'Successfully logged out'
        ]);
    }

    public function user(Request $request)
    {
        return response()->json($request->user());
    }
}