Updated Developers Guide (markdown)

Developers-Guide.md

@@ -89,3 +89,27 @@ The root Query and Mutation objects live in `_root.gql`
 
 The rest of the files contain domain specific declarations. For instance the Mutations
 for interacting with tasks is in the `task.gql` file.
+
+
+### Database Access
+
+Taskcafe uses `sqlc` (with `sqlx` for things that `sqlc` can not handle which hasn't been much so far) to handle database interactions. 
+
+`internal/db` exports a `New` method that takes in a `sqlx.DB` connection and returns a `Repository`.
+
+The `Repository` contains all the methods generated by `sqlc` from the `internal/db/query` SQL files.
+
+If you have the below query in one of the SQL files:
+``` sql
+-- name: GetProjects :many
+SELECT * FROM project;
+```
+
+Then the method can be accessed from the `Repository` like so:
+
+```
+projects, err := repository.GetProjects(ctx)
+```
+
+For more info on the `sqlc` query file format, take at look at [its documentation](https://sqlc.dev/).
+