Three new commands: 'opake logout [--did <did>]' removes account dir + config entry (clears default_did if removing default). 'opake set-default <did-or-handle>' updates default_did. 'opake accounts' lists all accounts, marks default with *. Also add --as global flag to Cli struct. Depends on #51 for CommandContext.
Three new commands: 'opake logout [--did <did>]' removes account dir + config entry (clears default_did if removing default). 'opake set-default <did-or-handle>' updates default_did. 'opake accounts' lists all accounts, marks default with *. Also add --as global flag to Cli struct. Depends on #51 for CommandContext.