### Install passage-identity Package

Source: https://github.com/passageidentity/passage-python/blob/main/README.md

Installs the passage-identity Python package using pip, the standard package installer for Python. This is the first step to integrating Passage authentication into your backend.

```shell
pip install passage-identity
```

--------------------------------

### Initialize Passage SDK

Source: https://github.com/passageidentity/passage-python/blob/main/README.md

Initializes the Passage SDK with the application ID and API key, retrieved from environment variables. The SDK can optionally be configured with an authentication strategy (cookie or header-based).

```python
PASSAGE_APP_ID = os.environ.get("YOUR_PASSAGE_APP_ID")
PASSAGE_API_KEY = os.environ.get("YOUR_PASSAGE_API_KEY")

psg = Passage(PASSAGE_APP_ID, PASSAGE_API_KEY)
```

--------------------------------

### Import Passage Library

Source: https://github.com/passageidentity/passage-python/blob/main/README.md

Imports necessary modules from the passageidentity library, specifically the Passage class, and the os module for environment variable access. This is required to initialize the Passage SDK.

```python
import os
from passageidentity import Passage
```

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