Get authorization

Question

I am creating a web portal where I want to authenticate my users by Microsoft authentication, I create my account on Azure after that I want to authorize my user by following these steps, but its not working

1 ) create an App on azure portal.
2 ) The first step to getting an access token for many OpenID Connect (OIDC) and OAuth 2.0 flows is to redirect the user to the Microsoft identity platform /authorize endpoint. Azure AD will sign the user in and request their consent for the permissions your app requests. In the authorization code grant flow, after consent is obtained, Azure AD will return an authorization_code to your app that it can redeem at the Microsoft identity platform /token endpoint for an access token.

I add these data in my code as

there is an error which I don't understand