Create the functionality for users to join training programs as trainees.
Acceptance Criteria:
A user should be able to join a training program.
The system should prevent duplicate joins.
The relationship between the user and training program should be stored in the database.
Create the functionality for users to join training programs as trainees. Acceptance Criteria:
A user should be able to join a training program. The system should prevent duplicate joins. The relationship between the user and training program should be stored in the database.