NewProjectService returns a pointer to ProjectService.

NewTaskService returns a pointer to TaskService.

NewUserService returns a pointer to UserService.

OpenDB returns a pointer to sqlx.DB and the first encountered error when attemping to establish a connection to the database url.

A Project enables splitting tasks into different categories and sharing them all at once with other users.

An ProjectService is a connection to the database with methods for interacting with the "projects" table.

A Task is a way for users to keep a title and helpful description of a thing they want to do, along with a completed state.

A TaskService is a connection to the database with methods for interacting with the "tasks" table.

A User is where we keep the information about a person, with the unique point of data being the email address.

A UserService is a connection to the database with methods for interacting with the "users" table.