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\subsection*{Summary}

Title\+: $<$Title, e.\+g. Authenticate$>$ Scope\+: $<$Scope, e.\+g. Authentication$>$ Level\+: $<$Level, e.\+g. User Goal$>$ Actors\+: $<$Actors, e.\+g. Anonymous User$>$ Brief\+: $<$Short explanation, e.\+g. User authenticates against the service to gain more privilegues$>$

\subsection*{Scenarios}

Precondition\+: $<$What has to be satisfied before the use case can work?, e.\+g. Not authenticated$>$ Main success scenario\+: $<$What is the main scenario, i.\+e. success scenario?, e.\+g. Is authenticated$>$ Alternative scenario\+: $<$What is the alternative scenario, i.\+e. simple error handling?, e.\+g. Wrong credentials$>$ Error scenario\+: $<$What is the other alternative scenario, i.\+e. fatal error handling?, e.\+g. Authentication block because of too many failed attempts$>$ Postcondition\+: $<$What has to be valid after the scenario was run?, e.\+g. Access to more functions$>$ Non-\/functional Constraints\+:
\begin{DoxyItemize}
\item $<$Some non-\/functional constraint, e.\+g. Security mechanism$>$
\item $<$\+More non-\/functional=\char`\"{}\char`\"{} constraints$>$=\char`\"{}\char`\"{}$>$ 
\end{DoxyItemize}