Getting users via email in data access

If you have attempted to code this yourself, hopefully it will follow a similar approach. First with import the following:

// nanoservices/auth/dal/src/users/transactions/get.rs
use crate::users::schema::User;
use glue::errors::{NanoServiceError, NanoServiceErrorStatus};
use std::future::Future;
use super::super::descriptors::SqlxPostGresDescriptor;
use crate::connections::sqlx_postgres::SQLX_POSTGRES_POOL;

We then define our trait with the code below:

// nanoservices/auth/dal/src/users/transactions/get.rs
pub trait GetByEmail {
    fn get_by_email(email: String)
    -> impl Future<Output = Result<
        User, NanoServiceError
    >> + Send;
}

And implement this trait for our Postgres descriptor with the following code:

// nanoservices/auth/dal/src/users/transactions/get.rs
impl GetByEmail for SqlxPostGresDescriptor {
    fn get_by_email(email: String)
        -> impl Future<Output = Result<
            User, NanoServiceError...