Will my log in be the same as my old one?

Rams2022 wrote:

I used the Migration Assistant. Now I can't log into my new Mac.

ref:

After migration, passwords do not work to… - Apple Community

Rams2022 wrote:

I transferred my files from my old Mac to my new one. Will the log in password be the same?

You would hope so...

The most trouble free way to move to a new machine, is using the Setup Assistant on the initial boot of a brand new machine— you have one shot here. Set up your MacBook Pro - Apple Support

The second best way is use the Migration Assistant.

How to move your content to a new Mac Move your content to a new Mac - Apple Support