Hi everyone. I am new to Salesforce and I apologize for a question that many people will find trivial. I'm trying to integrate my website into salesforce. My website uses its authorization based on a username and password. You need to safely tell my server about the salesforce user so that I can register in my DB and perform authorization.

I was some way to configure the connected app in the identity provider with SAML & OAUTH. But I don't understand what to do with them from my app, which is located in the Lightning Component Tab. I learned how to use apex to get information about the current user, but I can't figure out how to call the connected app, which would tell my server about the user.

I hope for your help.