Fatal error: Uncaught TypeError: Return value of Twilio\Base\BaseClient::getAccountSid() must be of the type string, null returned in /home/tryamm/tests.tryamm.ro/twilio-php-main/src/Twilio/Base/BaseClient.php:365 Stack trace: #0 /home/tryamm/tests.tryamm.ro/twilio-php-main/src/Twilio/Rest/Api/V2010.php(128): Twilio\Base\BaseClient->getAccountSid() #1 /home/tryamm/tests.tryamm.ro/twilio-php-main/src/Twilio/Rest/Api/V2010.php(276): Twilio\Rest\Api\V2010->getAccount() #2 /home/tryamm/tests.tryamm.ro/twilio-php-main/src/Twilio/Rest/Client.php(587): Twilio\Rest\Api\V2010->__get('account') #3 /home/tryamm/tests.tryamm.ro/twilio-php-main/src/Twilio/Base/BaseClient.php(280): Twilio\Rest\Client->getCalls() #4 /home/tryamm/tests.tryamm.ro/twilio-php-main/example/call.php(23): Twilio\Base\BaseClient->__get('calls') #5 {main} thrown in /home/tryamm/tests.tryamm.ro/twilio-php-main/src/Twilio/Base/BaseClient.php on line 365