feat: Added chapter 6 first auth attempt

sql/queries/users.sql

@@ -10,4 +10,8 @@ RETURNING *;
 
 -- name: DeleteUser :one
 DELETE FROM users
-RETURNING *;
+RETURNING *;
+
+-- name: GetUserByEmail :one
+SELECT * FROM users
+WHERE users.email = $1;

sql/schema/003_users_auth.sql

@@ -0,0 +1,7 @@
+-- +goose Up
+ALTER TABLE users
+ADD COLUMN hashed_password TEXT DEFAULT 'unset' NOT NULL;
+
+-- +goose Down
+ALTER TABLE users
+DROP COLUMN hashed_password;