Minecraft: multiplayer: authentication servers are down?

When I try to access a Minecraft server, I get the message: "Failed to login: The authentication servers are currently down for maintenance."

Since this has been a little longer and I have not found anything on minecraft.net, etc., I'm now asking the question here.

Maybe it's because they're just overwhelmed by Minecraft players. So just crashed.

Just wait a bit

I just had to restart or delete the server and add it again.

I have already made. I even reinstalled Minecraft: does not work.