How to get to the institute? (Fallout 4)

Konstantin Korobko
must first find the teleport device, after killing the hunter of the institute, then decoding is needed .. it is necessary in the dungeon, but I have not yet found the dungeon, but read the description in the task

to find the subway, you need to come along the path of freedom and then follow the red line, you will come where you need to go down to the basement and enter the password on the disk.
railroad password.
if you have already performed the square for the first hit, then most likely you will need to repeat the whole process over a new one. although I don’t know for sure.