```bash
ADMIN_EMAIL="******@****.***"
APP_NAME="ChimichangApp"
```

### Read settings from `.env` { #read-settings-from-env }

And then update your `config.py` with:

{* ../../docs_src/settings/app03_an_py39/config.py hl[9] *}

/// tip

     *            The byte buffer. Must not be {@literal null}.
     * @return The number of bytes read.
     */
    public static int read(final FileChannel channel, final ByteBuffer buffer) {
        assertArgumentNotNull("channel", channel);
        assertArgumentNotNull("buffer", buffer);

        try {
            return channel.read(buffer);
        } catch (final IOException e) {
            throw new IORuntimeException(e);

        trans2FindFirst2 = new Trans2FindFirst2(mockConfig, "\\test", "*.*", 0x16, 10, 1024);

        byte[] buffer = new byte[100];
        int read = trans2FindFirst2.readSetupWireFormat(buffer, 0, 100);

        assertEquals(0, read);
    }

    @Test
    @DisplayName("Test readParametersWireFormat returns 0")
    void testReadParametersWireFormat() {

            @Override
            public int read() throws IOException {
                return originalStream.read();
            }

            @Override
            public int read(byte[] b) throws IOException {
                return originalStream.read(b);
            }

            @Override
            public int read(byte[] b, int off, int len) throws IOException {

    InputStream in = url.openStream();
    try {
      OutputStream out = new FileOutputStream(file);
      try {
        byte[] buf = new byte[4096];
        for (int read = in.read(buf); read != -1; read = in.read(buf)) {
          out.write(buf, 0, read);
        }
      } finally {
        out.close();
      }
    } finally {
      in.close();
    }
  }

  @CanIgnoreReturnValue

    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/dict": {
                "get": {
                    "summary": "Read Dict",
                    "operationId": "read_dict_dict_get",
                    "responses": {
                        "200": {
                            "description": "Successful Response",

            byte[] expectedFileId = createTestData(16);
            System.arraycopy(expectedFileId, 0, buffer, bufferIndex, 16);

            // Read the buffer
            int bytesRead = notification.readBytesWireFormat(buffer, 0);

            // Verify the bytes read
            assertEquals(24, bytesRead);

            // Verify the fields were set correctly using reflection

            "summary": "Deadpool's favorite app. Nuff said.",
            "description": "\nChimichangApp API helps you do awesome stuff. 🚀\n\n## Items\n\nYou can **read items**.\n\n## Users\n\nYou will be able to:\n\n* **Create users** (_not implemented_).\n* **Read users** (_not implemented_).\n",
            "termsOfService": "http://example.com/terms/",
            "contact": {
                "name": "Deadpoolio the Amazing",

            // Simulate RDMA read operation
            log.debug("DiSNI RDMA read request: {} bytes from remote address 0x{}", bytesToRead, Long.toHexString(remoteAddress));

            return bytesToRead;

        } catch (Exception e) {
            state = RdmaConnectionState.ERROR;
            throw new IOException("DiSNI RDMA read failed", e);
        }
    }

    @Override

/// tip

The next sections are **not necessarily "advanced"**.

And it's possible that for your use case, the solution is in one of them.

///

## Read the Tutorial first { #read-the-tutorial-first }

The next sections assume you already read the main [Tutorial - User Guide: Security](../../tutorial/security/index.md){.internal-link target=_blank}.