Hi @RJRohit98 and @laicosnetcom
Check in your conf file. There must be some typo error in Twiio credentials. You can use this link to run your code online and also can directly copy paste code/credentials VMware, Virtualbox, Digital Ocean all are not working : Solved
Also I have mentioned one of the alternative of Twilio is Karix . Check the code snippet here Sms status : queued
Do let me know in case you need further assistance.