And you want to have a way for the frontend to authenticate with the backend, using a **username** and **password**.

We can use **OAuth2** to build that with **FastAPI**.

But let's save you the time of reading the full long specification just to find those little pieces of information you need.

Let's use the tools provided by **FastAPI** to handle security.

## How it looks { #how-it-looks }

 */
package org.codelibs.fess.app.logic;

import org.codelibs.fess.mylasta.action.FessUserBean;
import org.dbflute.hook.AccessContext;
import org.dbflute.optional.OptionalThing;
import org.lastaflute.core.time.TimeManager;
import org.lastaflute.db.dbflute.accesscontext.AccessContextResource;

import jakarta.annotation.Resource;

/**
 * The logic for access context.
 */
public class AccessContextLogic {

    /**

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.storage;

import java.time.ZonedDateTime;

/**
 * Represents a storage item (file or directory).
 */
public class StorageItem {

    private final String name;
    private final String path;
    private final boolean directory;

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.opensearch.config.bsentity;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

import org.codelibs.fess.opensearch.config.allcommon.EsAbstractEntity;
import org.codelibs.fess.opensearch.config.bsentity.dbmeta.ThumbnailQueueDbm;

/**

    }
    entry = cacheEntry2;
    if (entry != null && entry.key == key) {
      // Promote second cache entry to first so the access pattern
      // [K1, K2, K1, K3, K1, K4...] still hits the cache half the time.
      addToCache(entry);
      return entry.value;
    }
    return null;
  }

  @Override
  void clearCache() {
    super.clearCache();
    cacheEntry1 = null;
    cacheEntry2 = null;
  }

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.cling.transfer;

import java.io.PrintWriter;
import java.time.Duration;
import java.util.concurrent.TimeUnit;

import org.apache.maven.api.MonotonicClock;
import org.apache.maven.api.services.MessageBuilder;
import org.apache.maven.api.services.MessageBuilderFactory;

import org.openjdk.jmh.runner.options.OptionsBuilder;

/**
 * <p>Xpp3DomPerfTest class.</p>
 */
@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@Warmup(iterations = 3)
@Measurement(time = 10)
public class Xpp3DomPerfTest {
    @State(Scope.Benchmark)
    public static class AdditionState {
        List<Path> poms;

        @Setup(Level.Iteration)
        public void setUp() throws IOException {

		}

		writeSuccessResponseJSON(w, b)
	}
}

func addExpirationToCondValues(exp *time.Time, condValues map[string][]string) error {
	if exp == nil || exp.IsZero() || exp.Equal(timeSentinel) {
		return nil
	}
	dur := time.Until(*exp)
	if dur <= 0 {
		return errors.New("unsupported expiration time")
	}
	condValues["DurationSeconds"] = []string{strconv.FormatInt(int64(dur.Seconds()), 10)}
	return nil

  }

  /** Determines whether the given method is time-based. */
  private static boolean isTimed(Method method) {
    return isLongTimeUnitBased(method) || isDurationBased(method);
  }

  /** Determines whether the given method takes a time and unit as its last two parameters. */
  private static boolean isLongTimeUnitBased(Method method) {

        assertTrue(cos.isInMemory());
        assertFalse(cos.done);
        cos.close();
    }

    @Test
    public void testSingleByteWrites() throws IOException {
        // Writing one byte at a time
        ContentOutputStream cos = new ContentOutputStream(5, Curl.tmpDir);
        for (int i = 0; i < 3; i++) {
            cos.write(i);
        }
        assertTrue(cos.isInMemory());