Handle failed requests

Gemfile.lock

@@ -10,17 +10,33 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    addressable (2.5.2)
+      public_suffix (>= 2.0.2, < 4.0)
+    coderay (1.1.2)
+    crack (0.4.3)
+      safe_yaml (~> 1.0.0)
     faraday (0.15.2)
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.12.2)
       faraday (>= 0.7.4, < 1.0)
+    hashdiff (0.3.7)
+    method_source (0.9.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
     multipart-post (2.0.0)
     nitlink (1.1.0)
     nokogiri (1.8.3)
       mini_portile2 (~> 2.3.0)
+    pry (0.11.3)
+      coderay (~> 1.1.0)
+      method_source (~> 0.9.0)
+    public_suffix (3.0.2)
     rake (10.5.0)
+    safe_yaml (1.0.4)
+    webmock (3.4.2)
+      addressable (>= 2.3.6)
+      crack (>= 0.3.2)
+      hashdiff
 
 PLATFORMS
   ruby
@@ -29,7 +45,9 @@ DEPENDENCIES
   bundler (~> 1.16)
   manifique!
   minitest (~> 5.0)
+  pry (~> 0.11.3)
   rake (~> 10.0)
+  webmock (~> 3.4.2)
 
 BUNDLED WITH
    1.16.2