Create Trournament full flow

[jairogloz]

This task consists of implementing the create Tournament complete flow, on three layers:

• http handler
• service
• repository

The handler: (take cmd/api/handlers/player/create.go as reference)

• The handler should be a POST handler at the /tournaments path.
• I expects a core.TournamentCreateParams request body (see cmd/api/core/tournament.go)
• It should then create a domain.Tournament from it with this initial information and consume a TournamentService.Create function sending the request context and the tournament as parameters. The field AccountID can be set with a default value of "1" for now.
• If the service returns an error it should be handled with the core.RespondError function

The service: (take pkg/services/player/create.go as reference)

• The service receives a context object and the Tournament to be created.
• It should populate the Tournament missing information, like the creation time
• It should then consume a TournamentRepository.Insert funciton, sending the context and the domain.Tournament to be created
• If the repo returns an error it should be handled properly

The repo: (take pkg/repositories/mongo/player(insert.go as reference)

• The service receives the context and the domain.Tournament to insert
• It creates and assigns the id
• Inserts the tournament
• handles the error and returns an error if any

Notes:

• All your code must include function comments