Authentication

[hbulens]

Find a way to authenticate and store the authentication token in memory.

Start the session with an intuitive verb such as login, start or authenticate.

dimescheduler login

This should prompt the variables URI, E-mail address and Password and sign in the user subsequently, or throw an error if incorrect credentials are used.

If successful, the CLI should set a shared variable that is used throughout the session so the users don't have to specify credentials every time.