Insert in joint table before inserting in another one

Return type in service for "create" must ?Client. Entity, not ?Clients (service)

Simple CI 4 project for beginners codeigniter-expenses ( topic )

CodeIgniter 4 User Guide - Using CodeIgniter’s Model - Callbacks

What did you Try? What did you Get? What did you Expect?

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Return type in service for "create" must ?Client. Entity, not ?Clients (service)

Thanks a lot, it works
I have quite a few questions on your example, but i will ask them in a different post because different topic.

This thread https://forum.codeigniter.com/showthread.php?tid=88593

Simple CI 4 project for beginners codeigniter-expenses ( topic )