## **FastAPI**'s `OAuth2PasswordBearer` { #fastapis-oauth2passwordbearer }

**FastAPI** provides several tools, at different levels of abstraction, to implement these security features.

In this example we are going to use **OAuth2**, with the **Password** flow, using a **Bearer** token. We do that using the `OAuth2PasswordBearer` class.

/// info

    message = "moved to val",
    replaceWith = ReplaceWith(expression = "keyManager"),
    level = DeprecationLevel.ERROR,
  )
  fun keyManager(): X509KeyManager = keyManager

  @JvmName("-deprecated_trustManager")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "trustManager"),
    level = DeprecationLevel.ERROR,
  )
  fun trustManager(): X509TrustManager = trustManager

        // Set different levels
        when(basicInfo.getFileInformationLevel()).thenReturn(FileInformation.FILE_BASIC_INFO);
        when(standardInfo.getFileInformationLevel()).thenReturn(FileInformation.FILE_STANDARD_INFO);
        when(internalInfo.getFileInformationLevel()).thenReturn(FileInformation.FILE_INTERNAL_INFO);

        // Verify each has correct level

   * doubling the table causes no thread to hash to it under
   * expanded mask.  We do not try to detect or remove such cells,
   * under the assumption that for long-running instances, observed
   * contention levels will recur, so the cells will eventually be
   * needed again; and for short-lived ones, it does not matter.
   */

  /**
   * Padded variant of AtomicLong supporting only raw accesses plus CAS. The value field is placed

package jcifs.smb1.smb1;

import java.io.UnsupportedEncodingException;
import java.util.Date;

import jcifs.smb1.util.LogStream;

class Trans2FindFirst2Response extends SmbComTransactionResponse {

    // information levels

    static final int SMB_INFO_STANDARD = 1;
    static final int SMB_INFO_QUERY_EA_SIZE = 2;
    static final int SMB_INFO_QUERY_EAS_FROM_LIST = 3;
    static final int SMB_FIND_FILE_DIRECTORY_INFO = 0x101;

## Dependency Injection { #dependency-injection }

Using `BackgroundTasks` also works with the dependency injection system, you can declare a parameter of type `BackgroundTasks` at multiple levels: in a *path operation function*, in a dependency (dependable), in a sub-dependency, etc.

    @ParameterizedTest
    @ValueSource(bytes = { FileInformation.FILE_BASIC_INFO, FileInformation.FILE_STANDARD_INFO, FileInformation.FILE_INTERNAL_INFO })
    @DisplayName("Test readDataWireFormat with different information levels")
    void testReadDataWireFormatWithDifferentLevels(byte infoLevel) throws SMBProtocolDecodingException {
        response = new Trans2QueryPathInformationResponse(mockConfig, infoLevel);

        /**
         * The information level to return.
         */
        public int level;
        /**
         * The share information.
         */
        public NdrObject info;

        /**
         * Constructs a ShareGetInfo request.
         * @param servername the server name
         * @param sharename the share name
         * @param level the information level

        public LogMessage(final LogLevel level, final String message) {
            assertArgumentNotNull("level", level);

            this.level = level;
            this.message = message;
        }

        /**
         * Returns the log level.
         *
         * @return the log level
         */
        public LogLevel getLevel() {
            return level;
        }

        /**

        }
    }

    @Nested
    @DisplayName("Info Level Constants")
    class InfoLevelConstants {

        @Test
        @DisplayName("File info level should be 1")
        void testInfoFile() {
            assertEquals(1, Smb2Constants.SMB2_0_INFO_FILE, "File info level must be 1");
        }

        @Test
        @DisplayName("Filesystem info level should be 2")
        void testInfoFilesystem() {