I can't find any documentation on .success() and .error() methods on the Angular official API docs.
Not under $q or $http 
Have they been deprecated ? Where can I find some documentation ?
I can't find any documentation on .success() and .error() methods on the Angular official API docs.
Not under $q or $http 
Have they been deprecated ? Where can I find some documentation ?
Yes, sir, they are. You can find it in angularjs $q docs.
And this question, has good explanation, why they became deprecated.