// getUserWithProvider - returns the appropriate internal username based on the user provider.
// if validate is true, an error is returned if the user does not exist.
func getUserWithProvider(ctx context.Context, userProvider, user string, validate bool) (string, error) {
	switch userProvider {
	case madmin.BuiltinProvider:
		if validate {
			if _, ok := globalIAMSys.GetUser(ctx, user); !ok {
				return "", errNoSuchUser
			}
		}
		return user, nil

# Get Current User { #get-current-user }

In the previous chapter the security system (which is based on the dependency injection system) was giving the *path operation function* a `token` as a `str`:

{* ../../docs_src/security/tutorial001_an_py39.py hl[12] *}

But that is still not that useful.

Let's make it give us the current user.

## Create a user model { #create-a-user-model }

First, let's create a Pydantic user model.

		<packaging.fess.user>fess</packaging.fess.user>
		<packaging.fess.group>fess</packaging.fess.group>
		<packaging.fess.pid.dir>/var/run/fess</packaging.fess.pid.dir>
		<packaging.fess.systemd.dir>/usr/lib/systemd/system</packaging.fess.systemd.dir>
		<packaging.fess.systemd.sysctl.dir>/usr/lib/sysctl.d</packaging.fess.systemd.sysctl.dir>
		<packaging.fess.tmpfilesd.dir>/usr/lib/tmpfiles.d</packaging.fess.tmpfilesd.dir>

//// tab | Linux, macOS

```plaintext
/home/user/code/awesome-project/.venv/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

That means that the system will now start looking first for programs in:

```plaintext
/home/user/code/awesome-project/.venv/bin
```

before looking in the other directories.

For example, the `PATH` environment variable could look like this:

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

This means that the system should look for programs in the directories:

* `/usr/local/bin`
* `/usr/bin`
* `/bin`
* `/usr/sbin`
* `/sbin`

////

//// tab | Windows

```plaintext

# workers:
build:rbe_base --remote_download_toplevel
test:rbe_base --test_env=USER=anon

# TODO(kanglan): Check if we want to merge rbe_linux into rbe_linux_cpu.
build:rbe_linux --config=rbe_base
build:rbe_linux --action_env=PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/go/bin"
# Non-rbe settings we should include because we do not run configure
build:rbe_linux --config=avx_linux

Pero al usar `Security` en lugar de `Depends`, **FastAPI** sabrá que puede declarar scopes de seguridad, usarlos internamente y documentar la API con OpenAPI.

Pero cuando importas `Query`, `Path`, `Depends`, `Security` y otros de `fastapi`, en realidad son funciones que devuelven clases especiales.

///

## Usar `SecurityScopes`

Ahora actualiza la dependencia `get_current_user`.

Usadas por Starlette:

* <a href="https://www.python-httpx.org" target="_blank"><code>httpx</code></a> - Requerido si deseas usar el `TestClient`.
* <a href="https://jinja.palletsprojects.com" target="_blank"><code>jinja2</code></a> - Requerido si deseas usar la configuración de plantilla predeterminada.

            case SID_TYPE_ALIAS:
            case SID_TYPE_WKN_GRP:
                final int sid_index = rpc.names.names[si].sid_index;
                final rpc.unicode_string ustr = rpc.domains.domains[sid_index].name;
                sids[si].domainName = new UnicodeString(ustr, false).toString();
                break;
            }

            sids[si].acctName = new UnicodeString(rpc.names.names[si].name, false).toString();

* **Fácil**: Projetado para ser fácil de aprender e usar. Menos tempo lendo documentação.
* **Enxuto**: Minimize duplicação de código. Múltiplos recursos para cada declaração de parâmetro. Menos bugs.
* **Robusto**: Tenha código pronto para produção. E com documentação interativa automática.