Status Code 400 when running getting portfolio details

[SlayTheVirus]

I ran the following code:

Stash.portfolio(credentials).then(console.log);

Here is my console output:

Status Code 400
(node:2156) UnhandledPromiseRejectionWarning: #<Object>
(node:2156) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:2156) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I am able to run 'Stash.getDetails' with success but every other thing I tried returned Status Code 400 also.