Repo constructor

Repo(@JsonKey.new(name: 'project_id') String projectId, @JsonKey.new(name: 'user_id') String userId, @JsonKey.new(name: 'study_id') String studyId, GitProvider provider, @JsonKey.new(name: 'web_url') String? webUrl, @JsonKey.new(name: 'git_url') String? gitUrl,)