\documentclass{beamer}
\usetheme[numbering=progressbar]{focus}
%\definecolor{main}{RGB}{83, 31, 117}
%\definecolor{textcolor}{RGB}{0, 0, 0}
%\definecolor{background}{RGB}{215, 212, 227}

\usepackage[utf8]{inputenc}
\usepackage{tikz}
\usepackage{listings}
\usetikzlibrary{positioning}
\usetikzlibrary{shapes,arrows}

\author{\small{\input{../includes/authors.txt}}}
\title{Cerebrate}
\subtitle{Code review workshop}
\institute{}
\titlegraphic{\includegraphics[scale=0.2]{logo.png}}
\date{\input{../includes/location.txt}}

\begin{document}
\include{content}
\end{document}