Authenticating users using a custom connector with out them giving an API key

[zdieter]

Hi,

I followed this guide to create a custom connector https://docs.microsoft.com/en-us/graph/use-postman.

My custom connector works when I set up the authentication to be API key to be the Bearer Token. However, this only last 5 minutes then a new Bearer Token is needed and the user cannot give the correct access token in the first place. How can I go about solving this?

My custom connector gets specific security groups that the user owns using Postman.

Thank you,