Log JWT errors

app/Http/Middleware/JWTServer.php

@@ -205,8 +205,10 @@ class JWTServer
                 self::authenticate($request, $user);
             }
         } catch (JWTException $e) {
+            Log::Warning('JWT Exception while authenticating via API: "'.$e->getMessage().'"');
             return $this->fail(401, $e->getMessage());
         } catch (\InvalidArgumentException $e) {
+            Log::Error('Error validating token while authenticating via API: "'.$e->getMessage().'"');
             return $this->fail(401, 'Missing or corrupted token');
         }