@ritesh2004 Please verify that you are using the get token API with the correct credentials. For detailed instructions, refer to the API Documentation | Authorization and the Example Codes sections on how to use this API.
Also, please share your full curl request here to help us assist you faster.
Problem is solved. Actually there were some issue related to account.
@ritesh2004 Thanks for the update. I’m glad to hear that it’s working for you now.