!!! tip
        Prefer to use the `Annotated` version if possible.

    ```Python hl_lines="6  12-14  28-30  78-86"
    {!> ../../../docs_src/security/tutorial004.py!}
    ```

## Update the dependencies

Update `get_current_user` to receive the same token as before, but this time, using JWT tokens.

Decode the received token, verify it, and return the current user.

// it has sufficient capacity, the destination is resliced to accommodate the
// new elements. If it does not, a new underlying array will be allocated.
// Append returns the updated slice. It is therefore necessary to store the
// result of append, often in the variable holding the slice itself:
//
//	slice = append(slice, elem1, elem2)
//	slice = append(slice, anotherSlice...)
//

crosscompile: ## cross compile minio
	@(env bash $(PWD)/buildscripts/cross-compile.sh)

verifiers: lint check-gen

check-gen: ## check for updated autogenerated files
	@go generate ./... >/dev/null
	@(! git diff --name-only | grep '_gen.go$$') || (echo "Non-committed changes in auto-generated code is detected, please commit them to proceed." && false)

	if idx < 0 || idx >= len(x.versions) {
		return errFileNotFound
	}
	update := &x.versions[idx]
	prevMod := update.header.ModTime
	update.meta, err = ver.MarshalMsg(update.meta[:0:len(update.meta)])
	if err != nil {
		update.meta = nil
		return err
	}
	update.header = ver.header()
	if prevMod != update.header.ModTime {
		x.sortByModTime()
	}
	return nil
}

# SQL (Relational) Databases

!!! info
    These docs are about to be updated. 🎉

    The current version assumes Pydantic v1, and SQLAlchemy versions less than 2.0.

    The new docs will include Pydantic v2 and will use <a href="https://sqlmodel.tiangolo.com/" class="external-link" target="_blank">SQLModel</a> (which is also based on SQLAlchemy) once it is updated to use Pydantic v2 as well.

**FastAPI** doesn't require you to use a SQL (relational) database.

 *    cache.
 *
 * Sometimes a request will result in a conditional cache hit. If the cache contains a stale copy of
 * the response, the client will issue a conditional `GET`. The server will then send either
 * the updated response if it has changed, or a short 'not modified' response if the client's copy
 * is still valid. Such responses increment both the network count and hit count.
 *

And there are several ways to get help too.

## Subscribe to the newsletter

You can subscribe to the (infrequent) [**FastAPI and friends** newsletter](newsletter.md){.internal-link target=_blank} to stay updated about:

* News about FastAPI and friends 🚀
* Guides 📝
* Features ✨
* Breaking changes 🚨
* Tips and tricks ✅

## Follow FastAPI on Twitter

      val stream = streams.remove(streamId)

      // The removed stream may be blocked on a connection-wide window update.
      condition.signalAll()

      return stream
    }
  }

  internal fun updateConnectionFlowControl(read: Long) {
    this.withLock {
      readBytes.update(total = read)
      val readBytesToAcknowledge = readBytes.unacknowledged

* The interactive API documentation will be automatically updated, including the new body:

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Click on the button "Try it out", it allows you to fill the parameters and directly interact with the API:

// where the parent user is the DN of the actual LDAP user. The parent user
// itself cannot login, but the policy associated with them determines the base
// policy for the STS credential. The policy mapping can be updated by the
// administrator.
//
// - from `Subject.CommonName` field from the STS request for
// AssumeRoleWithCertificate. In this case, the policy for the STS credential
// has the same name as the value of this field.