HELP NEEDED HOW TO GET A PERSONS INSTAGRAM PASSWORD LOGIN

HI can anyone please help me with this problem right does anyone know how to get access to someones instagram account like to see like a persons messages and stuff they have uploaded. i have heard of brute force
and other stuff i am not sure what that is but i think it searches for a password i have heard of some stories and some sites where you can get someones instagram password.

i have the persons instagram username link of a few models and porn stars if anyone knows of a software or other way to do this that will find the instagram password of a account.

so can anyone please help me with this what is the best method to get a persons instagram password i dont want to change anything on a persons instagram account i just want to view a persons direct messages of a person can this be done if so how i would like to know how this can be done.

i have see some people on this site upload all types of softwares but nothing for instagram

so does anybody know how to do it step by step
so can anyone please help me with this question