web.config

gistfile1.txt

  <system.diagnostics>
    <switches>
      <add name="Microsoft.Owin" value="Verbose" />
    </switches>
    <trace autoflush="true"></trace>
    <sharedListeners>
      <add name="file" type="System.Diagnostics.TextWriterTraceListener" initializeData="debug.log" />
    </sharedListeners>
    <sources>
      <source name="Microsoft.Owin">
        <listeners>
          <add name="file" />
        </listeners>
      </source>
      <source name="System.Web.Http">
        <listeners>
          <add name="file" />
        </listeners>
      </source>
    </sources>
  </system.diagnostics>