Your LimeSurvey version: latest
Own server or LimeSurvey hosting: own servers
Survey theme/template: non yet
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We're a news and magazine publisher and we want to perform surveys with our logged in users.
What's special:

• users log in with our SSO (keycloak)
• all surveys are closed, non-public surveys for our b2b customers
• users must apply with a short application form in order to participate
• an editor picks participants manually from a list
• then users are invited to the survey via email and perform the survey
• after the survey is closed, a detailed report with the results is generated for the customers
• all users can see a summary of the results on our WordPress website; our plan was to create a WP Gutenberg block, that pulls the results from the limesurvey API (and caches them)

I have no doubts about the surveys themselves, and I've seen an older plugin for SSO integration, that may have to be updated. I know the groups feature, and saw the documentation of the participants list. But about applicant management I don't know, has anyone ever seen this as a use case?
Thanks in advance! And of course thanks for this awsome open source project...