public function __invoke()
{
return Promise\coroutine(function () {
$params = $this->logins ? ['Logins' => $this->logins] : [];
$getIdParams = $params + ['IdentityPoolId' => $this->identityPoolId];
if ($this->accountId) {
$getIdParams['AccountId'] = $this->accountId;
}
$id = (yield $this->client->getId($getIdParams));
$result = (yield $this->client->getCredentialsForIdentity(['IdentityId' => $id['IdentityId']] + $params));
(yield new Credentials($result['Credentials']['AccessKeyId'], $result['Credentials']['SecretKey'], $result['Credentials']['SessionToken'], (int) $result['Credentials']['Expiration']->format('U')));
});
}
