^{Originally posted by nalkhovikleverx May 11, 2024}
The API module will serve as API-gateway to our clients. Single API-gateway module should include a single transport which used for communication. First API-gateway should communicate via HTTP.

^{Originally posted by nalkhovikleverx April 21, 2024}

Problem

After successful registration confirmation, users are unable to log in with their registered password and email. To enable this functionality, we need to support it in our system.

Analysis

1. After successful registration, the user must be created in the UserAccess module. Currently, the UserAccess module lacks the command to create a user. This command needs to be implemented. Later, we will link the UserRegistration events with this command.
2. The Login command should also be implemented. It should accept the user's email and password as input and return the UserClaims object. For now, the fields of this object should include at least the following information:
   • UserID
   • Email

Possible Solution

We should focus on implementing only the application logic for now, without dwelling on infrastructure details. Examples provided here:

• Login(Authentication)
• Authenticate method in Java
• CreateUser

^{Originally posted by nalkhovikleverx April 19, 2024}

Problem

The invariants are meaningless in conditions of poor encapsulation. Right now you can edit the state of UserRegistration model from the lowest layers. It puts the model into an invalid state where model invariants aren't controlled.

Analysis

The question is how to maintain the encapsulation of UserRegistration in Go when we need its internal state to form a database query, or vice versa, when we need to restore the state of the UserRegistration from the database.

Possible Solution

To keep things simple we can use some sort of DTO which crosses not a network boundaries, but a logical boundaries of a model. We can use this DTO to populate the database state. Also we can use it to restore the model from the database as well.

The similar example we can see in:

• EventStore reference application
• Modular Monolith with DDD by Kamil Grzybek

Other solution is demonstrated in following projects:

• Wild Workouts By ThreeDots