test: Fix login from opening URLs automatically (#334)

When using VS Code's test on save, this was funny behavior 🤣.

cli/root.go

@@ -20,6 +20,7 @@ import (
 
 const (
 	varGlobalConfig = "global-config"
+	varNoOpen       = "no-open"
 	varForceTty     = "force-tty"
 )
 
@@ -71,6 +72,11 @@ func Root() *cobra.Command {
 		// This should never return an error, because we just added the `--force-tty`` flag prior to calling MarkHidden.
 		panic(err)
 	}
+	cmd.PersistentFlags().Bool(varNoOpen, false, "Block automatically opening URLs in the browser.")
+	err = cmd.PersistentFlags().MarkHidden(varNoOpen)
+	if err != nil {
+		panic(err)
+	}
 
 	return cmd
 }