\documentclass[10pt]{beamer}
\usetheme{metropolis}           % Use metropolis theme
% \usecolortheme{seahorse}
\usepackage{array}
\usepackage{float}
\usepackage{wrapfig}
\usepackage{graphicx}
\usepackage{blindtext}
\usepackage{lipsum}

\title{Sample Presentation}

\date{\today}

\author{John Doe - 123X \vspace{0.3cm}\\ Collaborator: John Doe, 789X}

\institute{XYZ Organization, ABC}

\begin{document}

\maketitle

\begin{frame}{What we need to do}

	\begin{block}{Aim}
		\vspace{0.3cm}
	    \blindenumerate
	\end{block}

\end{frame}

\begin{frame}

    \begin{center}
        \vspace*{\stretch{1}}
        \LARGE \textit{Fin.}
        \vspace*{\stretch{1}}
    \end{center}

\end{frame}

\end{document}