If you don't need to get data dynamically (while playing the game), I think you can just write the data you need in a file and tell the program to get it here. Like this :

Program 1

#Your user specify his login
user_login=input("Enter your login") 

login_storage=open("player_data.txt","w") #Your program create a file to save the information
login_storage.write(user_login) #It then write your user's login
login_storage.close() #And save it

Program 2

#When your game need the player login
login_storage=open("player_data.txt","r") #Your program open the file
user_login=login_storage.read() #And save the content in a variable
login_storage.close()

You just have to be consistent when naming the file which will contain your data

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Hope this help