Shopify-App-JS Rest Client Session Undefined

Retired Boards Appdev Partners Discussion
1 
const sessionCopy = new Session(sessionData); // Pulled from database.

// TODO: Getting error: TypeError: Cannot read properties of undefined (reading 'accessToken')
// at (/node_modules/@shopify/shopify-api/dist/cjs/lib/clients/admin/rest/client.js:27:50)

const restClient = new shopify.clients.Rest({sessionCopy});

Here’s the sessionData object:

{
  shop: 'X.myshopify.com',
  scope: 'read_orders',
  isOnline: false,
  id: 'offline_X.myshopify.com',
  state: '358222388575483',
  accessToken: 'shpua_XXXXXXXXXXXXXXXXXXXXXX'
}

And the sessionCopy objects, as logged in console:

{
  shop: 'X.myshopify.com',
  scope: 'read_orders',
  isOnline: false,
  id: 'offline_X.myshopify.com',
  state: '358222388575483',
  accessToken: 'shpua_XXXXXXXXXXXXXXXXXXXXXX',
  onlineAccessInfo: undefined,
  expires: undefined
}

Calling “const restClient = new shopify.clients.Rest({sessionCopy});” triggers the error “Cannot read properties of undefined (reading ‘accessToken’)”. Diving into the library’s “client.js” it appears the session object is undefined.

Am I creating the session wrong?