feat(api): add user methods

src/api/user.js

@@ -0,0 +1,47 @@
+import { config } from '../config';
+
+
+export const userAPI = {
+  login,
+  logout,
+};
+
+function login(email, password) {
+  const options = {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ email, password })
+  }
+
+  return fetch(`${config.baseURL}users/login`, options)
+    .then(handleResponse)
+    .then(user => {
+      localStorage.setItem('user', JSON.stringify(user));
+      return user;
+    });
+};
+
+
+function logout() {
+  localStorage.removeItem('user');
+}
+
+
+function handleResponse(response) {
+  return response.text()
+    .then(text => {
+        const data = text && JSON.parse(text);
+
+        if (!response.ok) {
+          if (response.status === 401) {
+            logout();
+          }
+
+          const error = (data && data.message) || response.statusText;
+          return Promise.reject(error);
+        }
+
+        return data;
+      }
+    );
+};