Link that opens on same page for letting a user sign on during a chat session

I would like to ask users to sign-in during a chat conversation, only if this is required for solving a support case. Since we have SSO enabled on our website, this usually requires users to follow a redirect link to sign in to our website and then automatically come back to the page they were in the help center.

I did not find a way to create a link with the conversation API which would not open a new browser tab. Therefore I cannot implement a redirect link so that users would come back to the previous page and then continue with their chat session within the same window.

Is there a way to present a link in a message that does not open in a new tab, or is there any other advice on how I can realize a user login during a chat session using SSO?