For ease of use, we also add a New() method which returns a Models struct containing the initialized MovieModel.

Check that the plaintext token has been provided and is exactly 26 bytes long.

Define constants for the token scope.

Define constants for the token scope.

Define a custom ErrDuplicateEmail error.

Define a custom ErrRecordNotFound error.

Define an error that our UnmarshalJSON() method can return if we're unable to parse or convert the JSON string successfully.

Define a custom ErrRecordNotFound error.

Define a new Metadata struct for holding the pagination metadata.

Create a Models struct which wraps the MovieModel.

Define the PermissionModel type.

Define a Token struct to hold the data for an individual token.

Define the TokenModel type.

Create a UserModel struct which wraps the connection pool.

Define a Permissions slice, which we will use to hold the permission codes (like "movies:read" and "movies:write") for a single user.