You need to check in database how is stored your password. Is it stored as 123456 or is crypted something like: $2y$10$UYwtjlZXTeMFSJuWfz7fZeR7e39Y4h7CIgj3f3iWEo4hkI4YNCtI2

When you are type your password in login page Laravel crypt your password in something like code above than compare crypted password and email with crypted password and email stored in database.

If your password is not crypted in database you need to crypt it before you store it. Check your logic in users registration and login code.

My password is encrpyted in the database. I use bcrypt to do it.

What I want to know is how this function "Auth->attempt" compare the credentials from the database to my input request.