from fastapi import Depends, FastAPI, Security
from fastapi.security import APIKeyHeader
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyHeader(name="key", description="An API Key Header")


class User(BaseModel):
    username: str


def get_current_user(oauth_header: str = Security(api_key)):
    user = User(username=oauth_header)
    return user

/// info | Technical Details

`Security` is actually a subclass of `Depends`, and it has just one extra parameter that we'll see later.

But by using `Security` instead of `Depends`, **FastAPI** will know that it can declare security scopes, use them internally, and document the API with OpenAPI.

But when you import `Query`, `Path`, `Depends`, `Security` and others from `fastapi`, those are actually functions that return special classes.

                sb.append("'>");
                sb.append(option.getLongOpt());
                sb.append("</a>");
            }

            if (option.hasArg()) {
                if (option.hasArgName()) {
                    sb.append(" &lt;").append(option.getArgName()).append("&gt;");
                } else {
                    sb.append(' ');
                }
            }
            sb.append("</code>");

        sb.append(dm).append(includedPaths);
        sb.append(dm).append(intervalTime);
        sb.append(dm).append(maxAccessCount);
        sb.append(dm).append(name);
        sb.append(dm).append(numOfThread);
        sb.append(dm).append(paths);
        sb.append(dm).append(permissions);
        sb.append(dm).append(sortOrder);
        sb.append(dm).append(timeToLive);
        sb.append(dm).append(updatedBy);

        sb.append(dm).append(includedUrls);
        sb.append(dm).append(intervalTime);
        sb.append(dm).append(maxAccessCount);
        sb.append(dm).append(name);
        sb.append(dm).append(numOfThread);
        sb.append(dm).append(permissions);
        sb.append(dm).append(sortOrder);
        sb.append(dm).append(timeToLive);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);

		return
	}
	// string "Endpoint"
	o = append(o, 0xa8, 0x45, 0x6e, 0x64, 0x70, 0x6f, 0x69, 0x6e, 0x74)
	o = msgp.AppendString(o, z.Endpoint)
	// string "Path"
	o = append(o, 0xa4, 0x50, 0x61, 0x74, 0x68)
	o = msgp.AppendString(o, z.Path)
	// string "Creds"
	o = append(o, 0xa5, 0x43, 0x72, 0x65, 0x64, 0x73)
	// map header, size 3
	// string "AccessKey"

        StringBuilder sb = new StringBuilder(128);
        sb.append(artifact.getArtifactId());
        sb.append('-').append(artifact.getBaseVersion());
        if (artifact.getClassifier() != null) {
            sb.append('-').append(artifact.getClassifier());
        }
        sb.append('.').append(artifact.getType()).append(LAST_UPDATE_TAG);
        return new File(artifact.getFile().getParentFile(), sb.toString());

        StringBuilder status = new StringBuilder();

        if (printResourceNames) {
            status.append(resourceName(resourceName));
            status.append(" (");
        }

        status.append(format.formatProgress(complete, total));

        if (printResourceNames) {
            status.append(")");
        }

        return status.toString();
    }

//// tab | Python 3.9+

```Python hl_lines="1"
async def needy_dependency(fresh_value: Annotated[str, Depends(get_value, use_cache=False)]):
    return {"fresh_value": fresh_value}
```

////

//// tab | Python 3.9+ без Annotated

/// tip | Подсказка

	// string "LastHour"
	o = append(o, 0x84, 0xa8, 0x4c, 0x61, 0x73, 0x74, 0x48, 0x6f, 0x75, 0x72)
	o, err = z.LastHour.MarshalMsg(o)
	if err != nil {
		err = msgp.WrapError(err, "LastHour")
		return
	}
	// string "SinceUptime"
	o = append(o, 0xab, 0x53, 0x69, 0x6e, 0x63, 0x65, 0x55, 0x70, 0x74, 0x69, 0x6d, 0x65)
	// map header, size 2
	// string "Count"
	o = append(o, 0x82, 0xa5, 0x43, 0x6f, 0x75, 0x6e, 0x74)