Hi SerginioDelTorro,
Welcome to the MSDN forum.
As far as I know, we can only manually change the authentication like you found and there is no such simple way to modify it after the project already created, sorry
for this inconvenience.
BTW, if you have more development issues about the Asp.NET Core application and since our forum is to discuss the VS IDE, please redirect to this appropriate forum:
https://forums.asp.net/1255.aspx/1?ASP+NET+Core and start a new thread to seek for a more professional support, thank you for your understanding.
Best regards,
Sara
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