* properly handle calls where the server is not returning any content…

… - typically a DELETE

* no need for token when deleting a demo.
#107

src/modules/demos.js

@@ -175,7 +175,7 @@ export function *watchEndDemoSession() {
     yield take(END_DEMO_SESSION);
     const demoState = yield select(demoSelector);
     try {
-      yield call(api.endDemo, demoState.guid, demoState.token);
+      yield call(api.endDemo, demoState.guid);
     }
     catch (error) {
       console.log('Error during logout', error);

src/services/index.js

@@ -11,7 +11,12 @@ export const callApi = (endpoint, {
     method,
     body: JSON.stringify(body),
   })
-  .then(response => response.json().then(json => ({ json, response })))
+  .then(response => {
+    if (response.status === 204) { // good response but no content
+      return { json: { status: 204, statusText: 'no content' }, response };
+    }
+    return response.json().then(json => ({ json, response }));
+  })
   .then(({ json, response }) => {
     if (!response.ok) {
       console.log(`Error calling URL : ${apiUrl}`);
@@ -28,9 +33,8 @@ export const createDemo = () =>
 
 export const getDemo = guid => callApi(`demos/${guid}`);
 
-export const endDemo = (guid, token) =>
+export const endDemo = (guid) =>
   callApi(`demos/${guid}`, {
-    headers: { Authorization: `Bearer ${token}` },
     method: 'DELETE',
   });