## Update the dependencies { #update-the-dependencies }

Update `get_current_user` to receive the same token as before, but this time, using JWT tokens.

Decode the received token, verify it, and return the current user.

If the token is invalid, return an HTTP error right away.

{* ../../docs_src/security/tutorial004_an_py310.py hl[90:107] *}

        // First: "" (sb becomes "")
        // Second: sb.length() is 0, no delimiter, append null (sb becomes "null")
        // Third: sb.length() > 0, add "-" + "value" (sb becomes "null-value")
        // Fourth: sb.length() > 0, add "-" + "" (sb becomes "null-value-")
        // Fifth: sb.length() > 0, add "-" + null (sb becomes "null-value--null")
        assertEquals("null-value--null", result);
    }

            _dst = _dst.derive(_nodei);
            for (int _i = 0; _i < _nodes; _i++) {
                _dst.enc_ndr_small(this.node[_i]);
            }
        }

        @Override
        public void decode(NdrBuffer _src) throws NdrException {
            _src.align(4);
            this.time_low = _src.dec_ndr_long();
            this.time_mid = (short) _src.dec_ndr_short();

        offset += 4;

        return offset - start;
    }

    /**
     * Decode directory lease context from buffer
     *
     * @param buffer the buffer containing the context data
     * @param offset offset in the buffer
     * @param length length of the context data
     */
    public void decode(byte[] buffer, int offset, int length) {

        int encodedSize = context.encode(buffer, 0);

        // Create new context for decoding
        CompressionNegotiateContext decodedContext = new CompressionNegotiateContext();
        int decodedSize = decodedContext.decode(buffer, 0, encodedSize);

        assertEquals(encodedSize, decodedSize);
        assertArrayEquals(context.getCompressionAlgorithms(), decodedContext.getCompressionAlgorithms());

	}

	// Fast path 2: Correct UTF-8 decode without error.
	_, width := utf8.DecodeRune(data)
	if width > 1 {
		// It's a valid encoding. Width cannot be one for a correctly encoded
		// non-ASCII rune.
		return width, data[0:width], nil
	}

	// We know it's an error: we have width==1 and implicitly r==utf8.RuneError.
	// Is the error because there wasn't a full rune to be decoded?

            dstIndex += this.salt.length;
        }

        return dstIndex - start;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Decodable#decode(byte[], int, int)
     */
    @Override
    public int decode(final byte[] buffer, int bufferIndex, final int len) throws SMBProtocolDecodingException {
        final int start = bufferIndex;
        final int nalgos = SMBUtil.readInt2(buffer, bufferIndex);

     */
    public long getLengthInBytes() {
        return this.lengthInBytes;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Decodable#decode(byte[], int, int)
     */
    @Override
    public int decode(final byte[] buffer, final int bufferIndex, final int len) throws SMBProtocolDecodingException {
        if (this.largeFile) {
            this.pid = SMBUtil.readInt2(buffer, bufferIndex);

	public fun <init> (Ljava/security/KeyPair;Ljava/security/cert/X509Certificate;)V
	public final fun certificate ()Ljava/security/cert/X509Certificate;
	public final fun certificatePem ()Ljava/lang/String;
	public static final fun decode (Ljava/lang/String;)Lokhttp3/tls/HeldCertificate;
	public final fun keyPair ()Ljava/security/KeyPair;
	public final fun privateKeyPkcs1Pem ()Ljava/lang/String;
	public final fun privateKeyPkcs8Pem ()Ljava/lang/String;
}

        return dstIndex - start;
    }

    /**
     * Decode a transform header from byte array
     *
     * @param buffer
     *            buffer to decode from
     * @param bufferIndex
     *            offset in buffer
     * @return new transform header instance
     */
    public static Smb2TransformHeader decode(final byte[] buffer, int bufferIndex) {