id
title
description
period
price
1
Test course
Application testing purposes
1
0
id
email
name
token
1
test@example.com
Test User
id
client_id
course_id
1
1
1
id
text
course_id
order
subject
1
This is a test message. Please ignore it.
1
0
Test message #1
2
This is a test message number two. Please ignore it.
1
1
Test message #2
id
letter_id
client_id
date
status