<span>(<span class="type-var">'arg1</span>, <span class="type-var">'arg2</span>, <span class="type-var">'input</span>, <span class="type-var">'output</span>, <span class="type-var">'error</span>, <span class="type-var">'security</span>)</span> <a href="index.html#type-post_service2">post_service2</a></span> <span>&#45;&gt;</span> <span class="type-var">'arg1</span> <span>&#45;&gt;</span> <span class="type-var">'arg2</span> <span>&#45;&gt;</span> <span><span><span>(<span class="type-var">'output</span>,