Improve authentication handling in a way that the username and password isn't exposed within the configuration (config.json) file.

Proposal:

• Remove username and password json settings from config.json.
• Prompt username and password when app starts for the first connection json details from config.json.
• Each "change" connection command prompt for username and password.

Things to consider:

• Save password as encrypted internal data.
• Perform a simple Rest API like z/OSMF system check to validate given username and password and provide return status message.
• We may need to reenter username and password for the current connection detail. Maybe use linux way like: usermod -l new_username old_username and -p for password
• Disable special key combination features while in username/password prompt like mkdir command.