Log function to achieve
- Read the user names and passwords from a file
- Allow multiple input is entered incorrectly
- If you enter more than three times the locked user error
Ideas:
1. The user name and password into json file in the form of key-value pairs
2. to achieve multiple input through the while loop
3. The determination is performed via the input is correct if-elif-else
4. Define a count variable to achieve a locking function account