So, to avoid ID collisions, when creating the JWT token for the user, you could prefix the value of the `sub` key, e.g. with `username:`. So, in this example, the value of `sub` could have been: `username:johndoe`.

The important thing to keep in mind is that the `sub` key should have a unique identifier across the entire application, and it should be a string.

 * example round-trip using {@link com.google.common.primitives.Doubles#stringConverter}:
 *
 * <ol>
 *   <li>{@code stringConverter().convert("1.00")} returns the {@code Double} value {@code 1.0}
 *   <li>{@code stringConverter().reverse().convert(1.0)} returns the string {@code "1.0"} --
 *       <i>not</i> the same string ({@code "1.00"}) we started with
 * </ol>
 *

    public void test_ingest_withNoFactory() {
        // No ingest factory set
        DataStoreParams paramMap = new DataStoreParams();
        Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("test", "value");

        // Execute
        Map<String, Object> result = indexUpdateCallback.ingest(paramMap, dataMap);

        // Verify data is returned unchanged
        assertSame(dataMap, result);
    }

  // We need to test that our method behaves like the JDK method.
  @SuppressWarnings("InlineMeInliner")
  public void testHashCode() {
    for (byte value : VALUES) {
      assertThat(Bytes.hashCode(value)).isEqualTo(Byte.hashCode(value));
    }
  }

  public void testContains() {
    assertThat(Bytes.contains(EMPTY, (byte) 1)).isFalse();
    assertThat(Bytes.contains(ARRAY1, (byte) 2)).isFalse();

        FileEndOfFileInformation decoded = new FileEndOfFileInformation();
        int decodedBytes = decoded.decode(buffer, 0, 8);
        assertEquals(8, decodedBytes);

        // Verify the round trip preserves the value
        // Note: We can't directly access endOfFile field, but toString contains it
        assertEquals(original.toString(), decoded.toString());
    }

    /**

                .thenReturn(true);
        when(toolchainFactoryBasicType.createToolchain(isA(org.apache.maven.api.toolchain.ToolchainModel.class)))
                .thenReturn(basicPrivate);

        List<Toolchain> toolchains =
                toolchainManager.getToolchains(session, "basic", Collections.singletonMap("key", "value"));

        assertEquals(1, toolchains.size());

		t.Errorf("Count() method should get correct value, expect: %v, got %v", count, len(users))
	}

	if err := DB.Model(&User{}).Where("name = ?", user1.Name).Or("name = ?", user3.Name).Count(&count).Find(&users).Error; err != nil {
		t.Errorf(fmt.Sprintf("Count should work, but got err %v", err))
	}

	if count != int64(len(users)) {
		t.Errorf("Count() method should get correct value, expect: %v, got %v", count, len(users))
	}

    CacheBuilder<Object, Object> builder = CacheBuilder.from(CacheBuilderSpec.disableCaching());
    Object key = new Object();
    Object value = new Object();
    LoadingCache<Object, Object> cache =
        builder.build(CacheLoader.from(Suppliers.ofInstance(value)));
    assertSame(value, cache.getUnchecked(key));
    assertEquals(0, cache.size());
    assertFalse(cache.asMap().containsKey(key));
  }

        // Then
        assertEquals(30000, timeout1, "First call should return correct value");
        assertEquals(30000, timeout2, "Second call should return correct value");
        assertEquals(30000, timeout3, "Third call should return correct value");
        verify(mockDelegate, times(3)).getResponseTimeout();
    }

    @Test

        boolean value = false;
        if (recommendedVersion != null) {
            value = true;
        } else {
            if (restrictions.isEmpty()) {
                throw new OverConstrainedVersionException("The artifact has no valid ranges", artifact);
            }
        }
        return value;
    }

    @Override
    public String toString() {