* Even dependencies can have dependencies, creating a hierarchy or **"graph" of dependencies**.
* All **automatically handled** by the framework.
* All the dependencies can require data from requests and **augment the path operation** constraints and automatic documentation.
* **Automatic validation** even for *path operation* parameters defined in dependencies.

              <version>3.5.1</version>
            </dependency>
          </dependencies>
        </plugin>
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>animal-sniffer-maven-plugin</artifactId>
          <version>1.23</version>
          <dependencies>
            <dependency>
              <groupId>org.ow2.asm</groupId>

              <version>3.5.1</version>
            </dependency>
          </dependencies>
        </plugin>
        <plugin>
          <groupId>org.codehaus.mojo</groupId>
          <artifactId>animal-sniffer-maven-plugin</artifactId>
          <version>1.23</version>
          <dependencies>
            <dependency>
              <groupId>org.ow2.asm</groupId>

  <groupId>gid</groupId>
  <version>0.1</version>

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-it-plugin</artifactId>
        <version>1.0</version>
        <dependencies>
          <dependency>
            <groupId>test</groupId>
            <artifactId>a</artifactId>
            <version>0.1</version>
          </dependency>
          <dependency>

        with:
          version: "0.4.15"
          enable-cache: true
          cache-dependency-glob: |
            requirements**.txt
            pyproject.toml
      - name: Install Dependencies
        run: uv pip install -r requirements-tests.txt
      - name: Install Pydantic v2
        run: uv pip install --upgrade "pydantic>=2.0.2,<3.0.0"
      - name: Lint
        run: bash scripts/lint.sh

  test:

```Python hl_lines="5  12-16"
{!> ../../docs_src/security/tutorial002.py!}
```

////

## Create a `get_current_user` dependency

Let's create a dependency `get_current_user`.

Remember that dependencies can have sub-dependencies?

`get_current_user` will have a dependency with the same `oauth2_scheme` we created before.

import pytest
from fastapi.exceptions import FastAPIError
from fastapi.testclient import TestClient

from ...utils import needs_py39


@pytest.fixture(name="client")
def get_client():
    from docs_src.dependencies.tutorial008c_an_py39 import app

    client = TestClient(app)
    return client


@needs_py39
def test_get_no_item(client: TestClient):
    response = client.get("/items/foo")

				</executions>
				<configuration>
					<configFile>https://www.codelibs.org/assets/formatter/eclipse-formatter-1.0.xml</configFile>
				</configuration>
			</plugin>
		</plugins>
	</build>
	<dependencies>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>1.7.26</version>
			<optional>true</optional>
		</dependency>
		<dependency>

  <artifactId>foo</artifactId>
  <groupId>foo</groupId>
  <version>99.44</version>
  <packaging>bleh</packaging>
  <dependencies>
    <dependency>
      <artifactId>artifactId</artifactId>
      <version>1.0</version>
    </dependency>
  </dependencies>

  <artifactId>foo</artifactId>
  <groupId>foo</groupId>
  <version>99.44</version>
  <packaging>bleh</packaging>
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>groupId</groupId>
        <version>version</version>
      </dependency>
    </dependencies>
  </dependencyManagement>