Cannot add a new project when having two accounts

[laushinka]

Bug description

When trying to add a new GitLab project under gitpod.io/new, I could not move forward and received no error messages. Supposedly this is caused by having two Gitpod accounts.

https://www.loom.com/share/ba9d0b291d1e491baafe7a1bd7db9ed3

Steps to reproduce

As the above video:

1. Have GitHub and GitLab accounts.
2. Log in via GitHub.
3. Go to https://gitpod.io/projects and click "New Project"
4. Click on the "change" link (to add a GitLab project)
5. Click on "Continue with GitLab"
6. You should see a modal pop up and then disappear. Nothing else will happen.

Workspace affected

No response

Expected behavior

I expect to be able to add a project, or see a helpful error message.

Example repository

No response

Anything else?

No response

[AlexTugarev]

@gtsiolis, how to render errors on the "Select Git Provider" page of New Project wizard? Do we have some visuals for that? 🙏🏻

[JanKoehnlein]

/schedule

[roboquat]

@JanKoehnlein: Issue scheduled in the meta team (WIP: 0)

In response to this:

/schedule

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[JanKoehnlein]

/assign @gtsiolis

[jldec]

Becuase this only impacts a subset of users, this is lower priority cc: @JanKoehnlein

[gtsiolis]

Nice catch @laushinka! ⚾

Ideally, we would automatically associate these accounts, see #5975. Cc @AlexTugarev because #5975 (comment). 🧙

Following the pattern used in the login page (see #3950), we could re-use it here below the provider selection, see early design specs below using an updated component design.

Login Page	Provider Selection Page

❗ The risk here is that we can not just prompt users to select a different provider as they are already logged in. Possible copy we could use here for the alert title:

1. Gitpod account already exists
2. Selected provider already in use

@AlexTugarev what do you think?

[AlexTugarev]

@laushinka and @gtsiolis, in such a case rendering of a useful message is a great idea.