\documentclass[11pt]{beamer}
\usetheme{Warsaw}
\usecolortheme{beetle}
\usepackage[utf8]{inputenc}
\usepackage[sort&compress]{natbib}
\usepackage{qrcode}

\begin{document}
 
\title[Short title]{Long title}
\subtitle{More detail}
\institute{Affiliation}
\author{Author name}
\date{Where and when this is presented}

\logo{McGill CCCS 690}

\frame{\titlepage}

\begin{frame}
  \begin{abstract}
    Summarize.
  \end{abstract}
\end{frame}

\section{Topic}

\begin{frame}{Something}
  
  Slide content.
  
\end{frame}

\section{Another topic}

\begin{frame}{Something else}
  
  Slide content.
  
\end{frame}

\begin{frame}{Contact}

  \begin{center}
    
    \url{author.name@email.mcgill.ca}
    
    \medskip
    
    \qrcode[height=35mm]{https://mcgill.ca}
    
  \end{center}
  
\end{frame}

\end{document}