return nil, err
	}
	return ekvs, nil
}

func readFromSecret(sp string) (string, error) {
	// Supports reading path from docker secrets, filename is
	// relative to /run/secrets/ position.
	if isFile(pathJoin("/run/secrets/", sp)) {
		sp = pathJoin("/run/secrets/", sp)
	}
	credBuf, err := os.ReadFile(sp)
	if err != nil {
		if os.IsNotExist(err) { // ignore if file doesn't exist.
			return "", nil
		}

		if cred.ParentUser != globalActiveCred.AccessKey || cred.IsTemp() {
			secret = nsecret
		}
	}
	if cred.IsServiceAccount() {
		token = cred.SessionToken
		secret = cred.SecretKey
	}

	if token != "" {
		claims, err := getClaimsFromTokenWithSecret(token, secret)
		if err != nil {
			return nil, toAPIErrorCode(r.Context(), err)
		}
		return claims.Map(), ErrNone
	}

	claims := xjwt.NewMapClaims()

    void testHandlePasswordOnly() throws Exception {
        JAASAuthenticator auth = new JAASAuthenticator("DOM", "user", "secret");
        PasswordCallback pc = new PasswordCallback("pass:", false);
        auth.handle(new Callback[] { pc });
        assertEquals("secret", new String(pc.getPassword()));
    }

    @Test
    @DisplayName("handle: empty user/domain edge yields '@' and null password")

	}
	return nil
}

// getTokenSigningKey returns secret key used to sign JWT session tokens
func getTokenSigningKey() (string, error) {
	secret := globalActiveCred.SecretKey
	if globalSiteReplicationSys.isEnabled() {
		secretKey, err := globalSiteReplicatorCred.Get(GlobalContext)
		if err != nil {
			return "", err
		}
		return secretKey, nil
	}
	return secret, nil
}

///

## Handle JWT tokens { #handle-jwt-tokens }

Import the modules installed.

Create a random secret key that will be used to sign the JWT tokens.

To generate a secure random secret key use the command:

<div class="termy">

```console
$ openssl rand -hex 32

09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7
```

        with:
          role-to-assume: arn:aws:iam::992382829881:role/GHASecrets_gradle_all
          aws-region: "eu-central-1"
      - name: get secrets
        uses: aws-actions/aws-secretsmanager-get-secrets@v2
        with:
          secret-ids: |
            PERFORMANCE_DB_URL, gha/gradle/_all/PERFORMANCE_DB_URL
            PERFORMANCE_DB_USERNAME, gha/gradle/_all/PERFORMANCE_DB_USERNAME

Pydantic models have a `.dict()` method that returns a `dict` with the model's data.

So, if we create a Pydantic object `user_in` like:

```Python
user_in = UserIn(username="john", password="secret", email="******@****.***")
```

and then we call:

```Python
user_dict = user_in.dict()
```

Autoriza la aplicación de la misma manera que antes.

Usando las credenciales:

Usuario: `johndoe`
Contraseña: `secret`

/// check | Revisa

Observa que en ninguna parte del código está la contraseña en texto claro "`secret`", solo tenemos la versión con hash.

///

<img src="/img/tutorial/security/image08.png">

Llama al endpoint `/users/me/`, obtendrás el response como:

Melden Sie sich bei der Anwendung auf die gleiche Weise wie zuvor an.

Verwenden Sie die Anmeldeinformationen:

Benutzername: `johndoe`
Passwort: `secret`.

/// check

Beachten Sie, dass im Code nirgendwo das Klartext-Passwort "`secret`" steht, wir haben nur die gehashte Version.

///

<img src="/img/tutorial/security/image08.png">

	if !compareSignatureV2(v2Auth, expectedAuth) {
		return ErrSignatureDoesNotMatch
	}
	return ErrNone
}

func calculateSignatureV2(stringToSign string, secret string) string {
	hm := hmac.New(sha1.New, []byte(secret))
	hm.Write([]byte(stringToSign))
	return base64.StdEncoding.EncodeToString(hm.Sum(nil))
}

// Return signature-v2 for the presigned request.