Authenticates the user and authorizes their access with QuickBooks Online. The starting point for all QuickBooks Online functions. Use this function to access your app that you set up.
![Pro](https://fmflare-www.s3.amazonaws.com/Services/QuickBooks_Online.png)
QuickBooks Online
Status: Released
Tier: Pro
Since: 2.10
Overview
Authenticates the user and authorizes their access with QuickBooks Online. The starting point for all QuickBooks Online functions. Use this function to access your app that you set up.