Final Submission - Executable Tutorial: Deploying an API with a Custo…

…m Lambda Authorizer using Serverless (#1387)

* Add proposal for Lambda Authorizer tutorial

* Add submission for feedback

* List changes made from feedback

contributions/executable-tutorial/oskstr/README.md

@@ -15,4 +15,30 @@ When I have worked with this on a personal project I wasn't able to find anythin
 
 While it would probably look better and be more useful on Medium, I'll probably have to go with one of the browser platforms like Katacoda based on the grading criteria.
 
-Question: Would it work if I create one version on Katacoda and one on Medium?
+Question: Would it work if I create one version on Katacoda and one on Medium?
+
+## Submission For Feedback
+I have opted to only do a version for Katacoda for now. 
+
+The tutorial can be found at [katacoda.com/oskstr/scenarios/lambda-authorizer-with-serverless](https://www.katacoda.com/oskstr/scenarios/lambda-authorizer-with-serverless)
+and the repo can be found at [oskstr/katacoda-scenarios](https://github.com/oskstr/katacoda-scenarios).
+
+Looking forward to feedback from @sfkwww as per [#1162](https://github.com/KTH/devops-course/pull/1162).
+
+## Final Submission
+The location of the tutorial is still the same but I have made the following changes:
+- [6c9ebab](https://github.com/oskstr/katacoda-scenarios/commit/6c9ebab) Change verbatim text to code blocks 
+- [084bc62](https://github.com/oskstr/katacoda-scenarios/commit/084bc62) Format policy snippet as JSON
+- [563582d](https://github.com/oskstr/katacoda-scenarios/commit/563582d) Change from replace to append/insert
+- [aea9485](https://github.com/oskstr/katacoda-scenarios/commit/aea9485) Fix typo
+- [ed6f7ec](https://github.com/oskstr/katacoda-scenarios/commit/ed6f7ec) Add explanation to image
+- [f59c842](https://github.com/oskstr/katacoda-scenarios/commit/f59c842) Add warning about error messages
+- [f1d6222](https://github.com/oskstr/katacoda-scenarios/commit/f1d6222) Explain bug where command isn't being run
+- [7109af6](https://github.com/oskstr/katacoda-scenarios/commit/7109af6) Make curl calls executable
+- [64dda2c](https://github.com/oskstr/katacoda-scenarios/commit/64dda2c) Explain which header we are looking for
+- [e0a040d](https://github.com/oskstr/katacoda-scenarios/commit/e0a040d) Explain how to set up an AWS user
+- [9c0e73a](https://github.com/oskstr/katacoda-scenarios/commit/9c0e73a) Add more spacing
+- [2444cbf](https://github.com/oskstr/katacoda-scenarios/commit/6c9ebab) Remove space that caused graphical bug
+- [85ad312](https://github.com/oskstr/katacoda-scenarios/commit/6c9ebab) Increase expected time for scenario
+
+Diff log: https://github.com/oskstr/katacoda-scenarios/compare/756b829...85ad312