docs: replace api doc

Author: tassiluca

docs/report-asw/figures/backend-routes/api.png

@@ -1094,32 +1094,16 @@ \subsubsection{Routes}
 
 \begin{figure}
     \centering
-    \begin{subfigure}[b]{0.3\textwidth}
-        \centering
-        \includegraphics[width=\textwidth]{./figures/backend-routes/users.png}
-        % \caption{}
-    \end{subfigure}
-    \hfill
-    \begin{subfigure}[b]{0.3\textwidth}
-        \centering
-        \includegraphics[width=\textwidth]{./figures/backend-routes/election.png}
-        %\caption{}
-    \end{subfigure}
-    \hfill
-    \begin{subfigure}[b]{0.3\textwidth}
-        \centering
-        \includegraphics[width=\textwidth]{./figures/backend-routes/code.png}
-        %\caption{}
-    \end{subfigure}
-    \hfill
-    \begin{subfigure}[b]{0.3\textwidth}
-        \centering
-        \includegraphics[width=\textwidth]{./figures/backend-routes/notifications.png}
-        %\caption{}
-    \end{subfigure}
-    \hfill
-    \caption{Backend routes api.}
-    \label{fig:backend-routes}
+    \includegraphics[width=\textwidth]{./figures/backend-routes/api.png}
+    \caption{API routes.}
+    \label{fig:backend-routes-api}
+\end{figure}
+
+\begin{figure}
+    \centering
+    \includegraphics[width=\textwidth]{./figures/backend-routes/auth.png}
+    \caption{Auth service routes, along with the schema of the response.}
+    \label{fig:backend-routes-auth}
 \end{figure}
 
 \subsubsection{Real time updates and notifications with \texttt{Socket.io}}