fix: detail messages if data.type is invalid

apiary.apib

@@ -104,7 +104,7 @@ https://twitter.com/gr2m/status/697804572623007744)
             errors: [{
                 "status": "409",
                 "title": "Conflict",
-                "detail": "Invalid type provided, only supported type is 'session'"
+                "detail": "data.type must be 'session'"
             }]
         }
 
@@ -338,7 +338,7 @@ or set account properties or destroy their accounts.
             errors: [{
                 "status": "409",
                 "title": "Conflict",
-                "detail": "Invalid type provided, only supported type is 'account'"
+                "detail": "data.type must be 'account'"
             }]
         }
 
@@ -787,7 +787,7 @@ A user can only see own requests. An admin can see all requests across accounts.
             errors: [{
                 "status": "409",
                 "title": "Conflict",
-                "detail": "Invalid type provided, only supported type is 'request'"
+                "detail": "data.type must be 'request'"
             }]
         }
 
@@ -975,7 +975,7 @@ Admins can fetch and manage all user accounts and their profile properties
             errors: [{
                 "status": "409",
                 "title": "Conflict",
-                "detail": "Invalid type provided, only supported type is 'session'"
+                "detail": "data.type must be 'session'"
             }]
         }