Closes #6184: Pass 'guid' correctly into update/add logins methods

    override fun validateCanPersist(login: Login): Deferred<Result> {

        return scope.async {

            try {

                storage.ensureValid(login)

                // We're setting guid=null here in order to trigger de-duping logic properly.

                // Internally, the library ensures to not dupe records against themselves

                // (via a `guid <> :guid` check), which means we need to "pretend" this is a new record,

                // in order for `ensureValid` to actually throw `DUPLICATE_LOGIN`.

                storage.ensureValid(login.copy(guid = null))

                Result.CanBeCreated

            } catch (e: InvalidRecordException) {

                when (e.reason) {

                Operation.CREATE -> {

                    // If an existing Login was autofilled, we want to clear its guid to

                    // avoid updating its record

                    loginStorage.add(login.copy(guid = ""))

                    loginStorage.add(login.copy(guid = null))

                }

            }

        }

    }

    /**

     * Returns whether an existing login record should be [UPDATE]d or a new one [CREATE]d, based

     * on the saved [ServerPassword] and new [Login].

     * Returns whether an existing login record should be UPDATED or a new one [CREATE]d, based

     * on the saved [Login] and new [Login].

     */

    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)

    fun getPersistenceOperation(newLogin: Login, savedLogin: Login?): Operation = when {

 * Converts an Android Components [Login] to an Application Services [ServerPassword]

 */

fun Login.toServerPassword() = ServerPassword(

    // Underlying Rust code will generate a new GUID

    id = "",

    // Underlying Rust code will generate a new GUID if `guid` is missing.

    id = guid ?: "",

    username = username,

    password = password,

    hostname = origin,

     */

    @Throws(IdCollisionException::class, InvalidRecordException::class, LoginsStorageException::class)

    override suspend fun add(login: Login): String = withContext(coroutineContext) {

        check(login.guid == null) { "'guid' for a new login must be `null`" }

        conn.getStorage().add(login.toServerPassword())

    }