///

Agora, obtenha os dados do usuário do banco de dados (falso), usando o `username` do campo do formulário.

Se não existir tal usuário, retornaremos um erro dizendo "Incorrect username or password" (Nome de usuário ou senha incorretos).

Para o erro, usamos a exceção `HTTPException`:

{* ../../docs_src/security/tutorial003_an_py310.py hl[3,79:81] *}

### Confira a password (senha)

* **Validate** the returned data.
    * If the data is invalid (e.g. you are missing a field), it means that *your* app code is broken, not returning what it should, and it will return a server error instead of returning incorrect data. This way you and your clients can be certain that they will receive the data and the data shape expected.
* Add a **JSON Schema** for the response, in the OpenAPI *path operation*.

		if err != nil {
			t.Errorf("Test %d: Expected to pass but failed. %s", i+1, err)
		}
		if err == nil && s != testCase.expectedSize {
			t.Errorf("Test %d: The calculated part size is incorrect: expected = %d, found = %d\n", i+1, testCase.expectedSize, s)
		}
	}

	testCasesFailure := []struct {
		totalSize int64
		partSize  int64
		partIndex int
		err       error
	}{

	s := NewScanner(strings.NewReader(text + "\n"))
	s.Buffer(make([]byte, 100), 3*MaxScanTokenSize)
	for s.Scan() {
		token := s.Text()
		if token != text {
			t.Errorf("scan got incorrect token of length %d", len(token))
		}
	}
	if s.Err() != nil {
		t.Fatal("after scan:", s.Err())
	}
}

// negativeEOFReader returns an invalid -1 at the end, as though it

     * We adjust approxLog10 and approxPow until they're equal to floor(log10(x)) and
     * 10^floor(log10(x)).
     */

    if (approxCmp > 0) {
      /*
       * The code is written so that even completely incorrect approximations will still yield the
       * correct answer eventually, but in practice this branch should almost never be entered, and
       * even then the loop should not run more than once.
       */
      do {

                last = smbe;
            } catch (final CIFSException e) {
                log.debug("send", e);
                last = e;
            }
            // If we get here, we got the 'The Parameter is incorrect' error or a transport exception
            // Disconnect and try again from scratch.

            if (log.isDebugEnabled()) {

                 * SMB_COM_SESSION_SETUP_ANDX from having it's uid set to an
                 * old value when the session is re-established. Otherwise a
                 * "The parameter is incorrect" error can occur.
                 */
                uid = 0;

                do {
                    switch (state) {
                    case 10: /* NTLM */

	Object    string
	VersionID string
	Err       error
}

// Unwrap the error to its underlying error.
func (e GenericError) Unwrap() error {
	return e.Err
}

// InvalidArgument incorrect input argument
type InvalidArgument GenericError

func (e InvalidArgument) Error() string {
	if e.Err != nil {
		return "Invalid arguments provided for " + e.Bucket + "/" + e.Object + ": (" + e.Err.Error() + ")"
	}

					// generating a valid credential field.
					generateCredentialStr(
						"Z7IXGOO6BZ0REAN1Q26I",
						sampleTimeStr,
						"us-west-1",
						"s3",
						"aws4_request"),
					// Incorrect SignedHeader field.
					"SignIncorrectHeader=",
					"b",
				}, ","),

			expectedAuthField: signValues{},
			expectedErrCode:   ErrMissingSignHeadersTag,
		},
		// Test case - 6.

   * clazz.isAssignableFrom(x)}, but note that lambdas do not have human-readable {@link
   * #toString()} representations and are not serializable.
   *
   * @since 20.0 (since 10.0 under the incorrect name {@code assignableFrom})
   */
  @J2ktIncompatible
  @GwtIncompatible // Class.isAssignableFrom
  public static Predicate<Class<?>> subtypeOf(Class<?> clazz) {
    return new SubtypeOfPredicate(clazz);
  }