Menu option #6 does not work

[chrisidso]

Saw this on linux (Ubuntu). To repro:
Type 2 to add then enter a small number.
When the menu reappears type 6 to create a back up file. I typed 'lion7' ...

Expected: Should allow you to type a file name and then create the desired back up file.
Actual: Error message:

Please wait while the database file is backed-up ...

Traceback (most recent call last):
File "main.py", line 161, in
main(db_file)
File "main.py", line 121, in main
msg = backup_db(db_file)
File "main.py", line 22, in backup_db
copyfile(db_file['path'], new_file)
File "/home/newton/anaconda3/lib/python3.7/shutil.py", line 121, in copyfile
with open(dst, 'wb') as fdst:
FileNotFoundError: [Errno 2] No such file or directory: 'db/backup/lion7.sqlite'

[datatalking]

Please review issue#10 with the investpy potential new data source.