Authentication (#37)

* Initial authentication implementation

* Store user info in the database, improve encapsulation in profiles

* Add user list, remove unused dependencies, add spantraces

* Implement user remove, update UUID crate

* Add user set-default

* Revert submodule macro usage

* Make tracing significantly less verbose

theseus/src/util/mod.rs

@@ -1,3 +1,23 @@
 //! Theseus utility functions
 pub mod fetch;
 pub mod platform;
+
+/// Wrap a builder which uses a mut reference into one which outputs an owned value
+macro_rules! wrap_ref_builder {
+    ($id:ident = $init:expr => $transform:block) => {{
+        let mut it = $init;
+        {
+            let $id = &mut it;
+            $transform;
+        }
+        it
+    }};
+}
+
+/// Alias a trait, used to avoid needing nightly features
+macro_rules! alias_trait {
+    ($scope:vis $name:ident : $bound:path $(, $bounds:path)*) => {
+        $scope trait $name: $bound $(+ $bounds)* {}
+        impl<T: $bound $(+ $bounds)*> $name for T {}
+    }
+}