})
		if err != nil {
			c.Fatalf("Error initializing client: %v", err)
		}

		// Validate that the client from sts creds can access the bucket.
		c.mustListObjects(ctx, minioClient, bucket)

		// Set up revocation
		user := accessKey
		tokenType := tc.tokenType
		reqAdmClient := s.adm
		if tc.fullRevoke {
			tokenType = ""
		}
		if tc.selfRevoke {
			user = ""
			tokenType = ""

letter, nearly as large as himself, and this he handed over to
the other, saying, in a solemn tone, `For the Duchess.  An
invitation from the Queen to play croquet.'  The Frog-Footman
repeated, in the same solemn tone, only changing the order of the
words a little, `From the Queen.  An invitation for the Duchess
to play croquet.'

  Then they both bowed low, and their curls got entangled
together.

     * {@code
     * String username = f.getPrincipal().getName();
     * }
     * The {@code Principal} object returned will never be {@code null}
     * however the username can be {@code null} indication anonymous
     * credentials were used (e.g. some IPC$ services).
     */

    /**
     * Returns the principal used for authentication
     *
     * @return the authentication principal
     */