Hi @Hareesh_Shinde1. Thanks for reaching out. For some reason the error message landed in a personal message, so I’ll just repost here to make sure it’s the correct one.
“The supplied credentials are not authorized for this resource while creating business verified customer in sandbox”
Personal Verified Customers and Business Verified Customers contain different bodies. You can view an example of the request body in the first step to creating a business verified customer here.
We also have a postman collection for our API you can use to test along side our sandbox as well. This post, Using postman to explore and debug Dwolla’s v2 API, is a helpful guide for this collection.
Please also make sure that your sandbox is not set to “Limited to Receive-only customers”.
Please let me know if this was helpful in case I addressed the wrong error message.