Better verbosity for API

src/Server/Controllers/JobListingController.cs

@@ -16,7 +16,7 @@ namespace BoredCareers.Controllers {
             if (jobListing != null) {
                 return Ok(jobListing);
             }
-            return NotFound();
+            return NotFound("Job listing not found");
         }
 
         [HttpGet]
@@ -32,8 +32,9 @@ namespace BoredCareers.Controllers {
                     await _databaseService.SetJobListing(JobListing);
                     return Ok();
                 }
+                return NotFound("You are not an employee of company");
             }
-            return NotFound();
+            return NotFound("Not logged in");
         }
 
         [HttpDelete]
@@ -45,9 +46,11 @@ namespace BoredCareers.Controllers {
                         await _databaseService.DeleteJobListing(JobListingID);
                         return Ok();
                     }
+                    return NotFound("You are not an employee of company");
                 }
+                return NotFound("Job listing doesn't exist already");
             }
-            return NotFound();
+            return NotFound("Not logged in");
         }
 
     }