Cleanup tenant passing and getLogin helper method

internal/cli/root.go

@@ -5,15 +5,11 @@ import (
 	"os"
 
 	"github.com/auth0/auth0-cli/internal/display"
-	"github.com/spf13/afero"
 	"github.com/spf13/cobra"
 )
 
 // Execute is the primary entrypoint of the CLI app.
 func Execute() {
-	// fs is a mock friendly os.File interface.
-	fs := afero.NewOsFs()
-
 	// cfg contains tenant related information, e.g. `travel0-dev`,
 	// `travel0-prod`. some of its information can be sourced via:
 	// 1. env var (e.g. AUTH0_API_KEY)
@@ -28,7 +24,7 @@ func Execute() {
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		Short:         "Command-line tool to interact with Auth0.",
-		Long:          "Command-line tool to interact with Auth0.\n" + getLogin(&fs, cli),
+		Long:          "Command-line tool to interact with Auth0.\n" + getLogin(cli),
 
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
 			// If the user is trying to login, no need to go
@@ -46,7 +42,7 @@ func Execute() {
 
 	rootCmd.SetUsageTemplate(namespaceUsageTemplate())
 	rootCmd.PersistentFlags().StringVar(&cli.tenant,
-		"tenant", "", "Specific tenant to use.")
+		"tenant", cli.config.DefaultTenant, "Specific tenant to use.")
 
 	rootCmd.PersistentFlags().BoolVar(&cli.verbose,
 		"verbose", false, "Enable verbose mode.")