❔ Blazor external login

Hi folks, I'm working with a Blazor Server project, where I am using Identity for inbuilt account registration and login, but wish to expand this to other external providers. With regards to current progress, I have the existing working account system, but my progress with the external logins is still quite early despite throwing a lot of time at it. The login page displays a list of buttons (screenshot) which it gets from a list in the code-behind (screenshot) which it gets from a controller (screenshot). Though there are many hurdles, the first I'm facing is getting the link to redirect the user to the external login service. Despite looking at the code for, and trying to copy, scaffolded code for Identity external login (screenshot), I have not been able to make any progress Any pointers or ideas would be much appreciated. The goal I have is to direct the user to the external login provider, where their email can then be checked against the database, logging the user in if they have an account and creating one if they don't. Thanks in advance!