Supersedes #73, so we don't have to write to protected folders.
If environment variable key is not specified, check home_folder/soccer-cli.ini for key.
If file exists with key, load key from file and use that every time afterward.
If file does not exist, record key from stdin, write that to file and use that every time afterward.
Supersedes #73, so we don't have to write to protected folders.
If environment variable key is not specified, check home_folder/soccer-cli.ini for key. If file exists with key, load key from file and use that every time afterward. If file does not exist, record key from stdin, write that to file and use that every time afterward.
cc @Saturn @ueg1990