Minecraft on a different account?

I want to log into my friend's account (Minecraft) but it says that the password or EMAIL is wrong or invalid. Is that because you can't play on another account?

Maybe it's because he gave you wrong dates.

Did you even ask him?

No, this means that the email and / or password has been incorrectly / changed;)

Yes, he agrees and sent me the data

Then maybe he made a mistake.

No, you can play Minecraft on any account. You probably have something wrong with the login or something wrong.

No, the email, password must be wrong.

At the beginning I was able to access his account, but then I couldn't. But thanks anyway