Choose between accounts on login

[ilmartyrk]

Currently we have option for users to have multiple accounts connected with their personal id, but on login we choose the first created one. We should also add possibility for users to have option to switch accounts when they log in using ID authentication methods and have multiple accounts related with that id.

[loorm]

Google has tried account switching for many years now and it is still so complicated, that even moderately IT-literate people are having trouble.

[anettlinno]

Triage 65. Opportunity to switch between different accounts would help us to solve the issue where users have multiple email accounts (work-related topics and groups and private groups and topics).
Currently we have 282 people who have multiple accounts related to their eID.

I would like to bring to examples for inspiration.

1. I think that Slack has solved this very nicely and it is convenient and easy to find for user to switch between different accounts. In Slack version, user can be logged-in to all accounts and easily shift between those by clicking on the logo.

2. Trello allows to add another account and then switch accounts. User can only be logged in with one account. Changing the account is a little bit more complicated (more clicks for user) but totally doable.

Question:

• Do we allow users to stay logged-in only in one account or multiple accounts? Currently our system logs user out from all open windows if user changes the account in any window OR if the browsing time expires. I think that easiest (and most secure) would be if we only allow to be logged-in with one account.
  @ilmartyrk @kevin

[BeccaMelhuish]

@ilmartyrk @ssin1901 Will put this into 'later' for now