Zig's import system is straightforward and relies on the @import function and pub keyword (to make code accessible outside the current file).

Instead of a package concept, each file is its own distinct namespace. Declarations must be exported to be used elseware.

main.zig:

const std = @import("std");
const User = @import("user.zig").User;

pub fn main() void {
    const user = User{
        .power = 9001,
        .name = "Goku",
    };

    std.debug.print("{s}'s power is {d}\n", .{ user.name, user.power });
}

user.zig

pub const User = struct {
    power: u64,
    name: []const u8,
};

If user.zig had instead exported multiple things we could use it like this:

const user = @import("models/user.zig");
const User = user.User;
const MAX_POWER = user.MAX_POWER