---
title: "Usage"
---

Prerequisite: [Install the CLI](../../getting-started/cli/installation)

## Login

Login in using the `login` command in your terminal. Logging in is a one-time, post-installation action that authenticates you with the platform — to change users, you can run the command again.

```bash
infisical login
```

## Initialization

In the root of your local project, initialize Infisical and follow steps to connect your project to the platform.

```bash
cd /path/to/project

# initialization
infisical init
```

## Injecting environment variables

To inject environment variables from the platform to your project, use the `run` command.

```bash
# command
infisical run -- [your application start command]
```

Options you can specify:

| Option        | Description                                                                                                 | Default value |
| ------------- | ----------------------------------------------------------------------------------------------------------- | ------------- |
| `--env`       | Used to set the environment that secrets are pulled from. Accepted values: `dev`, `staging`, `test`, `prod` | `dev`         |
| `--projectId` | Used to link a local project to the platform (required only if injecting via the service token method)      | `None`        |

Examples:

```bash
# example with node
infisical run -- node index.js

# example with node (nodemon)
infisical run -- nodemon index.js

# example with node (nodemon) pulling in secrets from test environment
infisical run --env=test -- nodemon index.js

# example with flask
infisical run -- flask run
```