because you need to buy a premium account of minecraft.net
you must log in with a premium account so it can download the packages
If you either signed up for Minecraft on Mojang.com or you migrated your Minecraft account, then use your e-mal address and password to log in to the game console. If you signed up on Minecraft.net or you have not yet migrated your account to Mojang, then log in to the console using your username andpassword. If this fails, migrate your Minecraft account to Mojang Remember that in order to successfully log in, you must own a premium Minecraft account.
You Need His Email To Log On
If it says login failed its either because your username or password is wrong or youdon'thave internet at the moment
It means that either your username or password is incorrect.
You can't log in to minecraft because you didn't download it. And there is no login like username and password. You just download start game then start playing!
A username and password that mojang gives you that allows you to log into minecraft as well as remember a custom skin of the character.
It is your account that is made premium. You could log into your account from any PC that has the Minecraft client.
Your username/password may be wrong, or you've been banned
First, go to Minecraft.net and register an account. You may do this by creating an account and then going to the store and purchasing a premium account for abour $30. Then, download Minecraft from Minecraft.net . Then open Minecraft. Once you open minecraft, a pop-up might come up asking you if you want to allow the program. Click don't adk me again (cause it's really annoying). Then accept it. The Minecraft browser will pop up. At the bottom right hand corner, there will be two boxes: Username and Password. Input your chosen username and password. Click on the Log In button. You have now logged in to Minecraft! Hope this helps, --Horn
I think either because you did not install the minecraft properly or you typo error at your password or your username