Across the codebase we have asynchronous code written using promises, which is hard to read and to maintain and error-prone.

All this code needs to be rewritten using the async/await syntax.

If you want to work on this, please create a sub-ticket for the file or section of the code you want to convert, and assign that sub-ticket to you (or ask me [monkey] to do it for you )

One golden rule for async/await: be sure to catch potential errors thrown by the code, otherwise an uncaught error could crash the server.
Some reading material:
https://catchjs.com/Docs/AsyncAwait
http://thecodebarbarian.com/async-await-error-handling-in-javascript.html