*/
  @Synchronized
  @Throws(IOException::class)
  operator fun get(key: String): Snapshot? {
    initialize()

    checkNotClosed()
    validateKey(key)
    val entry = lruEntries[key] ?: return null
    val snapshot = entry.snapshot() ?: return null

    redundantOpCount++
    journalWriter!!.writeUtf8(READ)
      .writeByte(' '.code)

		}
	}

internalAuth:
	ui, ok := globalIAMSys.GetUser(context.Background(), user)
	if !ok {
		return nil, errNoSuchUser
	}

	if caPublicKey != nil && pass == nil {
		err := validateKey(c, key)
		if err != nil {
			return nil, errAuthentication
		}
	} else {
		// Temporary credentials are not allowed.
		if ui.Credentials.IsTemp() {
			return nil, errAuthentication
		}