<span class="keyword">with</span> <span class="keyword">type</span> <a href="UserStoreInMemory/index.html#type-user_id">user_id</a> = string) <span>&#45;&gt;</span> <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-SessionStoreInMemory"><a href="#module-SessionStoreInMemory" class="anchor"></a><code><span class="keyword">module</span> <a href="SessionStoreInMemory/index.html">SessionStoreInMemory</a> : <a href="index.html#module-type-Sessio