"Must be authenticated as user with id: X" when trying to generate a token for a user

Created by: mike-r-mclaughlin

• Sourcegraph version: 3.38.1

When trying to generate an access token as a site admin on behalf of a user, you receive an error. It seems like, this button should be removed or made to work.

Steps to reproduce:

1. Login to Sourcegraph with a site admin account
2. Go to Users > (select user) > Account tokens
3. Click '+ Generate new token'
4. Add a description
5. Click '+ Generate token'

Expected behavior:

Token is generated for the user.

Actual behavior:

You receive an error:

Must be authenticated as user with id X