['Admin 12345', 'User 123']

 Name = ['Admin', 'User']
Password = ['12345', '123']

 list_in = ['Admin 12345', 'User 123']
list_user = []
list_pas = []
for user_pas in list_in:
    user, pas = user_pas.split(' ')
    list_user += [user]
    list_pas += [pas]

  
>>> lst = ['Admin 12345', 'User 123']
>>> 
>>> names, passwords = zip(*map(str.split, lst))
>>> 
>>> names
('Admin', 'User')
>>> passwords
('12345', '123')
>>>