Add sqlx as conditional dependency to the model

That way, we can use query_as

src/domain/handler.rs

@@ -105,15 +105,7 @@ impl BackendHandler for SqlBackendHandler {
             query_builder.to_string(SqliteQueryBuilder)
         };
 
-        let results = sqlx::query(&query)
-            .map(|row: DbRow| User {
-                user_id: row.get::<String, _>("user_id"),
-                email: row.get::<String, _>("email"),
-                display_name: row.get::<String, _>("display_name"),
-                first_name: row.get::<String, _>("first_name"),
-                last_name: row.get::<String, _>("last_name"),
-                creation_date: row.get::<chrono::NaiveDateTime, _>("creation_date"),
-            })
+        let results = sqlx::query_as::<_, User>(&query)
             .fetch(&self.sql_pool)
             .collect::<Vec<sqlx::Result<User>>>()
             .await;

src/domain/sql_tables.rs

@@ -2,7 +2,6 @@ use sea_query::*;
 
 pub type Pool = sqlx::sqlite::SqlitePool;
 pub type PoolOptions = sqlx::sqlite::SqlitePoolOptions;
-pub type DbRow = sqlx::sqlite::SqliteRow;
 
 #[derive(Iden)]
 pub enum Users {