Merge branch '37-correct-feedback-message' into 'master'

Resolve "Correct feedback message"

Closes #37

See merge request !40

api/endpoints/user.py

@@ -46,7 +46,7 @@ class UserEndpoint(Resource):
                 else:
                     return jsonify({"message": "email or password not matching", 'status': 400})
             else:
-                return jsonify({"message": "admins can't delete themselves", 'status': 400})
+                return jsonify({"message": "admins cannot delete themselves", 'status': 400})
         else:
             return jsonify({"message": "wrong data sent", 'status': 400})